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Lua i Stíl Chicago (17ú heag.)Foerster, Heinz von. "Circular Causality: The Beginnings of an Epistemology of Responsibility / Heinz Von Foerster." Transactions=Protokolle.(2003) .
Lua MLA (8ú heag.)Foerster, Heinz von. "Circular Causality: The Beginnings of an Epistemology of Responsibility / Heinz Von Foerster." Transactions=Protokolle.(2003), .
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.