<hi xmlns="http://www.tei-c.org/ns/1.0" rend="bold">Unity Technologies</hi> (2018). “Unity - Game Engine.” Letzter Zugriff Januar 12, 2018. <ref xmlns="http://www.tei-c.org/ns/1.0" target="https://unity3d.com/de/"> <hi rend="underline">https://unity3d.com/de/</hi> </ref>.