Cita APA (7a ed.)

Zoological Society of London. (1959). International zoo yearbook. Zoological Society of London.

Cita Chicago Style (17a ed.)

Zoological Society of London. International Zoo Yearbook. London: Zoological Society of London, 1959.

Cita MLA (9a ed.)

Zoological Society of London. International Zoo Yearbook. Zoological Society of London, 1959.