diff --git a/application/src/Entity/Attribut/MembersAttribut.php b/application/src/Entity/Attribut/MembersAttribut.php
new file mode 100644
index 0000000..9b47c25
--- /dev/null
+++ b/application/src/Entity/Attribut/MembersAttribut.php
@@ -0,0 +1,33 @@
+<?php
+
+namespace App\Entity\Attribut;
+
+use Doctrine\Common\Collections\Collection;
+use App\Entity\Source\SourceInterface;
+
+/**
+ * @author kevinfrantz
+ */
+trait MembersAttribut
+{
+    /**
+     * @var Collection|SourceInterface[]
+     */
+    protected $memberships;
+
+    /**
+     * @return Collection|SourceInterface[]
+     */
+    public function getMembers(): Collection
+    {
+        return $this->memberships;
+    }
+
+    /**
+     * @param Collection|SourceInterface[] $members
+     */
+    public function setMembers(Collection $members): void
+    {
+        $this->memberships = $members;
+    }
+}
diff --git a/application/src/Entity/Attribut/MembersAttributInterface.php b/application/src/Entity/Attribut/MembersAttributInterface.php
new file mode 100644
index 0000000..9eaff9a
--- /dev/null
+++ b/application/src/Entity/Attribut/MembersAttributInterface.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace App\Entity\Attribut;
+
+use Doctrine\Common\Collections\Collection;
+use App\Entity\Source\SourceInterface;
+
+/**
+ * @author kevinfrantz
+ */
+interface MembersAttributInterface
+{
+    /**
+     * @param Collection|SourceInterface[] $members
+     */
+    public function setMembers(Collection $members): void;
+
+    /**
+     * @return Collection|SourceInterface[]
+     */
+    public function getMembers(): Collection;
+}
diff --git a/application/src/Entity/Attribut/MembershipsAttribut.php b/application/src/Entity/Attribut/MembershipsAttribut.php
index 1403f9e..d576bc4 100644
--- a/application/src/Entity/Attribut/MembershipsAttribut.php
+++ b/application/src/Entity/Attribut/MembershipsAttribut.php
@@ -3,7 +3,7 @@
 namespace App\Entity\Attribut;
 
 use Doctrine\Common\Collections\Collection;
-use App\Entity\Source\Complex\Collection\TreeCollectionSourceInterface;
+use App\Entity\Source\SourceInterface;
 
 /**
  * @author kevinfrantz
@@ -11,12 +11,12 @@ use App\Entity\Source\Complex\Collection\TreeCollectionSourceInterface;
 trait MembershipsAttribut
 {
     /**
-     * @var Collection|TreeCollectionSourceInterface[]
+     * @var Collection|SourceInterface[]
      */
     protected $memberships;
 
     /**
-     * @return Collection|TreeCollectionSourceInterface[]
+     * @return Collection|SourceInterface[]
      */
     public function getMemberships(): Collection
     {
@@ -24,7 +24,7 @@ trait MembershipsAttribut
     }
 
     /**
-     * @param Collection|TreeCollectionSourceInterface[] $memberships
+     * @param Collection|SourceInterface[] $memberships
      */
     public function setMemberships(Collection $memberships): void
     {
diff --git a/application/src/Entity/Attribut/MembershipsAttributInterface.php b/application/src/Entity/Attribut/MembershipsAttributInterface.php
index 83d6080..da005a0 100644
--- a/application/src/Entity/Attribut/MembershipsAttributInterface.php
+++ b/application/src/Entity/Attribut/MembershipsAttributInterface.php
@@ -3,7 +3,7 @@
 namespace App\Entity\Attribut;
 
 use Doctrine\Common\Collections\Collection;
-use App\Entity\Source\Complex\Collection\TreeCollectionSourceInterface;
+use App\Entity\Source\SourceInterface;
 
 /**
  * @author kevinfrantz
@@ -11,12 +11,12 @@ use App\Entity\Source\Complex\Collection\TreeCollectionSourceInterface;
 interface MembershipsAttributInterface
 {
     /**
-     * @param Collection|TreeCollectionSourceInterface[] $groups
+     * @param Collection|SourceInterface[] $groups
      */
     public function setMemberships(Collection $memberships): void;
 
     /**
-     * @return Collection|TreeCollectionSourceInterface[]
+     * @return Collection|SourceInterface[]
      */
     public function getMemberships(): Collection;
 }
diff --git a/application/src/Entity/Source/AbstractSource.php b/application/src/Entity/Source/AbstractSource.php
index 46b7417..62d393c 100644
--- a/application/src/Entity/Source/AbstractSource.php
+++ b/application/src/Entity/Source/AbstractSource.php
@@ -1,4 +1,5 @@
 <?php
+
 namespace App\Entity\Source;
 
 use Doctrine\ORM\Mapping as ORM;
@@ -13,15 +14,14 @@ use App\Entity\Meta\LawInterface;
 use App\Entity\Meta\Law;
 use Doctrine\Common\Collections\ArrayCollection;
 use App\Entity\Attribut\MembershipsAttribut;
-use App\Entity\Source\Complex\Collection\TreeCollectionSourceInterface;
 use App\Entity\Attribut\SlugAttribut;
 use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
 use Symfony\Component\Validator\Constraints as Assert;
+use App\Entity\Attribut\MembersAttribut;
 
 /**
- *
  * @author kevinfrantz
- *        
+ *
  * @ORM\Entity
  * @ORM\Table(name="source")
  * @ORM\InheritanceType("JOINED")
@@ -43,7 +43,7 @@ use Symfony\Component\Validator\Constraints as Assert;
  */
 abstract class AbstractSource extends AbstractEntity implements SourceInterface
 {
-    use RelationAttribut,MembershipsAttribut, LawAttribut,SlugAttribut;
+    use RelationAttribut,MembershipsAttribut, LawAttribut,SlugAttribut,MembersAttribut;
 
     /**
      * System slugs should be writen in UPPER CASES
@@ -57,7 +57,6 @@ abstract class AbstractSource extends AbstractEntity implements SourceInterface
     protected $slug;
 
     /**
-     *
      * @var RelationInterface
      * @ORM\OneToOne(targetEntity="App\Entity\Meta\Relation",cascade={"persist", "remove"})
      * @ORM\JoinColumn(name="relation_id", referencedColumnName="id", onDelete="CASCADE")
@@ -66,9 +65,10 @@ abstract class AbstractSource extends AbstractEntity implements SourceInterface
     protected $relation;
 
     /**
-     * Many Sources have many Source Members
+     * Many Sources have many Source Members.
+     *
      * @var Collection|SourceInterface[]
-     * @ORM\ManyToMany(targetEntity="AbstractSource", inversedBy="members",cascade={"persist"})
+     * @ORM\ManyToMany(targetEntity="AbstractSource", inversedBy="memberships",cascade={"persist"})
      * @ORM\JoinTable(name="source_members",
      *      joinColumns={@ORM\JoinColumn(name="source_id", referencedColumnName="id")},
      *      inverseJoinColumns={@ORM\JoinColumn(name="member_id", referencedColumnName="id")}
@@ -77,14 +77,12 @@ abstract class AbstractSource extends AbstractEntity implements SourceInterface
     protected $members;
 
     /**
-     *
      * @var Collection|SourceInterface[]
      * @ORM\ManyToMany(targetEntity="AbstractSource",mappedBy="members",cascade={"persist"})
      */
     protected $memberships;
 
     /**
-     *
      * @ORM\OneToOne(targetEntity="App\Entity\Meta\Law",cascade={"persist", "remove"})
      * @ORM\JoinColumn(name="law_id", referencedColumnName="id")
      *
@@ -99,5 +97,6 @@ abstract class AbstractSource extends AbstractEntity implements SourceInterface
         $this->relation->setSource($this);
         $this->law = new Law();
         $this->memberships = new ArrayCollection();
+        $this->members = new ArrayCollection();
     }
 }
diff --git a/application/src/Entity/Source/Complex/Collection/AbstractCollectionSource.php b/application/src/Entity/Source/Complex/Collection/AbstractCollectionSource.php
index f7aa1d7..56023fe 100644
--- a/application/src/Entity/Source/Complex/Collection/AbstractCollectionSource.php
+++ b/application/src/Entity/Source/Complex/Collection/AbstractCollectionSource.php
@@ -18,8 +18,11 @@ abstract class AbstractCollectionSource extends AbstractSource implements Collec
 
     /**
      * @var Collection|SourceInterface[]
-     * @ORM\ManyToMany(targetEntity="App\Entity\Source\AbstractSource",inversedBy="memberships")
-     * @ORM\JoinTable(name="source_group_members")
+     * @ORM\ManyToMany(targetEntity="App\Entity\Source\AbstractSource")
+     * @ORM\JoinTable(name="collection_source",
+     *      joinColumns={@ORM\JoinColumn(name="collection_id", referencedColumnName="id")},
+     *      inverseJoinColumns={@ORM\JoinColumn(name="source_id", referencedColumnName="id")}
+     *  )
      */
     protected $collection;
 
diff --git a/application/src/Entity/Source/Complex/Collection/TreeCollectionSource.php b/application/src/Entity/Source/Complex/Collection/TreeCollectionSource.php
index 4601f84..326f7fe 100644
--- a/application/src/Entity/Source/Complex/Collection/TreeCollectionSource.php
+++ b/application/src/Entity/Source/Complex/Collection/TreeCollectionSource.php
@@ -3,7 +3,6 @@
 namespace App\Entity\Source\Complex\Collection;
 
 use Doctrine\ORM\Mapping as ORM;
-use App\Entity\Attribut\CollectionAttribut;
 
 /**
  * @author kevinfrantz
@@ -11,5 +10,4 @@ use App\Entity\Attribut\CollectionAttribut;
  */
 class TreeCollectionSource extends AbstractCollectionSource implements TreeCollectionSourceInterface
 {
-    use CollectionAttribut;
 }
diff --git a/application/src/Entity/Source/SourceInterface.php b/application/src/Entity/Source/SourceInterface.php
index f7702c5..608fa39 100644
--- a/application/src/Entity/Source/SourceInterface.php
+++ b/application/src/Entity/Source/SourceInterface.php
@@ -8,10 +8,11 @@ use App\Entity\Attribut\LawAttributInterface;
 use App\Entity\Attribut\RelationAttributInterface;
 use App\Entity\Attribut\MembershipsAttributInterface;
 use App\Entity\Attribut\SlugAttributInterface;
+use App\Entity\Attribut\MembersAttributInterface;
 
 /**
  * @author kevinfrantz
  */
-interface SourceInterface extends IdAttributInterface, EntityInterface, MembershipsAttributInterface, LawAttributInterface, RelationAttributInterface, SlugAttributInterface
+interface SourceInterface extends IdAttributInterface, EntityInterface, MembershipsAttributInterface, LawAttributInterface, RelationAttributInterface, SlugAttributInterface, MembersAttributInterface
 {
 }
diff --git a/application/tests/Unit/Entity/Attribut/MembersAttributTest.php b/application/tests/Unit/Entity/Attribut/MembersAttributTest.php
new file mode 100644
index 0000000..e5dd68d
--- /dev/null
+++ b/application/tests/Unit/Entity/Attribut/MembersAttributTest.php
@@ -0,0 +1,37 @@
+<?php
+
+namespace Tests\Unit\Entity\Attribut;
+
+use PHPUnit\Framework\TestCase;
+use Doctrine\Common\Collections\ArrayCollection;
+use App\Entity\Attribut\MembersAttributInterface;
+use App\Entity\Source\SourceInterface;
+use App\Entity\Attribut\MembersAttribut;
+
+class MembersAttributTest extends TestCase
+{
+    /**
+     * @var MembersAttributInterface
+     */
+    protected $members;
+
+    public function setUp(): void
+    {
+        $this->members = new class() implements MembersAttributInterface {
+            use MembersAttribut;
+        };
+    }
+
+    public function testConstructor(): void
+    {
+        $this->expectException(\TypeError::class);
+        $this->members->getMembers();
+    }
+
+    public function testAccessors(): void
+    {
+        $membership = $this->createMock(SourceInterface::class);
+        $this->assertNull($this->members->setMembers(new ArrayCollection([$membership])));
+        $this->assertEquals($this->members->getMembers()->get(0), $membership);
+    }
+}
diff --git a/application/tests/Unit/Entity/Source/AbstractSourceTest.php b/application/tests/Unit/Entity/Source/AbstractSourceTest.php
index 26dada2..362d253 100644
--- a/application/tests/Unit/Entity/Source/AbstractSourceTest.php
+++ b/application/tests/Unit/Entity/Source/AbstractSourceTest.php
@@ -32,6 +32,7 @@ class AbstractSourceTest extends TestCase
         $this->assertInstanceOf(RelationInterface::class, $this->source->getRelation());
         $this->assertInstanceOf(Collection::class, $this->source->getMemberships());
         $this->assertInstanceOf(LawInterface::class, $this->source->getLaw());
+        $this->assertInstanceOf(Collection::class, $this->source->getMembers());
     }
 
     public function testSlugInit(): void
diff --git a/application/tests/Unit/Repository/UserSourceRepositoryTest.php b/application/tests/Unit/Repository/UserSourceRepositoryTest.php
index 102144e..b7734d8 100644
--- a/application/tests/Unit/Repository/UserSourceRepositoryTest.php
+++ b/application/tests/Unit/Repository/UserSourceRepositoryTest.php
@@ -1,4 +1,5 @@
 <?php
+
 namespace tests\Unit\Repository;
 
 use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;
@@ -10,33 +11,27 @@ use App\Entity\Source\Complex\UserSource;
 
 class UserSourceRepositoryTest extends KernelTestCase
 {
-
     /**
-     *
      * @var EntityManager
      */
     protected $entityManager;
 
     /**
-     *
      * @var UserSourceRepository
      */
     protected $userSourceRepository;
 
     /**
-     *
      * @var UserSourceInterface
      */
     protected $loadedUserSource;
 
     /**
-     *
      * @var UserInterface
      */
     protected $user;
 
     /**
-     *
      * @var UserSourceInterface
      */
     protected $userSource;
@@ -89,7 +84,6 @@ class UserSourceRepositoryTest extends KernelTestCase
     }
 
     /**
-     *
      * {@inheritdoc}
      *
      * @see \Symfony\Bundle\FrameworkBundle\Test\KernelTestCase::tearDown()