Cita APA (7th ed.)

Dathe, H., & Röding, K. (1990). Tierpark Berlin (o.A.).

Cita Chicago (17th ed.)

Dathe, Heinrich, i Klaus-Dieter Röding. Tierpark Berlin. o.A. Berlin, 1990.

Cita MLA (8th ed.)

Dathe, Heinrich, i Klaus-Dieter Röding. Tierpark Berlin. o.A. 1990.