Cita APA (7th ed.)
Berlin, P., & Janßen, V. (1990). The Peter Berlin collection. Janssen.
Cita Chicago (17th ed.)
Berlin, Peter, i Volker Janßen. The Peter Berlin Collection. Berlin: Janssen, 1990.
Cita MLA (9th ed.)
Berlin, Peter, i Volker Janßen. The Peter Berlin Collection. Janssen, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.