diff --git a/application/src/Domain/SourceManagement/SourceMembershipInformation.php b/application/src/Domain/SourceManagement/SourceMembershipInformation.php
new file mode 100644
index 0000000..1397b8a
--- /dev/null
+++ b/application/src/Domain/SourceManagement/SourceMembershipInformation.php
@@ -0,0 +1,46 @@
+<?php
+
+namespace App\Domain\SourceManagement;
+
+use Doctrine\Common\Collections\Collection;
+use App\Entity\Source\SourceInterface;
+use Doctrine\Common\Collections\ArrayCollection;
+
+class SourceMembershipInformation implements SourceMembershipInformationInterface
+{
+    /**
+     * @var SourceInterface
+     */
+    private $source;
+
+    /**
+     * @var Collection
+     */
+    private $memberships;
+
+    public function __construct(SourceInterface $source)
+    {
+        $this->source = $source;
+    }
+
+    private function itterateOverMemberships(Collection $memberships): void
+    {
+        /**
+         * @var SourceInterface
+         */
+        foreach ($memberships as $membership) {
+            if (!$this->memberships->contains($membership)) {
+                $this->memberships->add($membership);
+                $this->itterateOverMemberships($membership->getMemberships());
+            }
+        }
+    }
+
+    public function getAllMemberships(): Collection
+    {
+        $this->memberships = new ArrayCollection();
+        $this->itterateOverMemberships($this->source->getMemberships());
+
+        return $this->memberships;
+    }
+}
diff --git a/application/src/Domain/SourceManagement/SourceMembershipInformationInterface.php b/application/src/Domain/SourceManagement/SourceMembershipInformationInterface.php
new file mode 100644
index 0000000..c5587c3
--- /dev/null
+++ b/application/src/Domain/SourceManagement/SourceMembershipInformationInterface.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace App\Domain\SourceManagement;
+
+use Doctrine\Common\Collections\Collection;
+
+interface SourceMembershipInformationInterface
+{
+    public function getAllMemberships(): Collection;
+}
diff --git a/application/src/Exception/RecursiveException.php b/application/src/Exception/RecursiveException.php
new file mode 100644
index 0000000..035a671
--- /dev/null
+++ b/application/src/Exception/RecursiveException.php
@@ -0,0 +1,7 @@
+<?php
+
+namespace App\Exception;
+
+class RecursiveException extends \Exception
+{
+}
diff --git a/application/tests/Unit/Domain/SourceManagement/SourceMembershipInformationTest.php b/application/tests/Unit/Domain/SourceManagement/SourceMembershipInformationTest.php
new file mode 100644
index 0000000..de64d56
--- /dev/null
+++ b/application/tests/Unit/Domain/SourceManagement/SourceMembershipInformationTest.php
@@ -0,0 +1,57 @@
+<?php
+
+namespace Tests\Unit\Domain\SourceManagement;
+
+use PHPUnit\Framework\TestCase;
+use App\Domain\SourceManagement\SourceMembershipInformationInterface;
+use App\Domain\SourceManagement\SourceMembershipInformation;
+use App\Entity\Source\SourceInterface;
+use App\Entity\Source\Complex\UserSource;
+use App\Entity\Source\Primitive\Text\TextSource;
+use App\Entity\Source\Primitive\Name\FirstNameSource;
+use Doctrine\Common\Collections\ArrayCollection;
+use App\Entity\Source\Complex\FullPersonNameSource;
+
+class SourceMembershipInformationTest extends TestCase
+{
+    /**
+     * @var SourceInterface
+     */
+    protected $source;
+
+    /**
+     * @var SourceMembershipInformationInterface
+     */
+    protected $sourceMembershipInformation;
+
+    public function setUp(): void
+    {
+        $this->source = new UserSource();
+        $this->sourceMembershipInformation = new SourceMembershipInformation($this->source);
+    }
+
+    public function testOneDimension(): void
+    {
+        $this->source->getMemberships()->add(new TextSource());
+        $this->assertEquals(1, $this->sourceMembershipInformation->getAllMemberships()->count());
+    }
+
+    public function testThreeDimension(): void
+    {
+        $source1 = new TextSource();
+        $source2 = new FirstNameSource();
+        $source2->setMemberships(new ArrayCollection([$source1]));
+        $source3 = new FullPersonNameSource();
+        $source3->getMemberships()->add($source2);
+        $this->source->getMemberships()->add($source3);
+        $this->assertEquals(3, $this->sourceMembershipInformation->getAllMemberships()->count());
+    }
+
+    public function testRecursion(): void
+    {
+        $recursiveSource = new UserSource();
+        $recursiveSource->getMemberships()->add($this->source);
+        $this->source->getMemberships()->add($recursiveSource);
+        $this->assertEquals(2, $this->sourceMembershipInformation->getAllMemberships()->count());
+    }
+}