Von Hagen, V. W. (1946). South American Zoo. Lulian Messner.
Cita Chicago (17th ed.)Von Hagen, Víctor W. South American Zoo. Lulian Messner, 1946.
Cita MLA (9th ed.)Von Hagen, Víctor W. South American Zoo. Lulian Messner, 1946.
Atenció: Aquestes cites poden no estar 100% correctes.