Cita APA

Beer, G. D. (1960). Vertebrate zoology. Sidgwick and jackson ltd.

Citación estilo Chicago

Beer, Gavin De. Vertebrate Zoology. London: Sidgwick and jackson ltd, 1960.

Cita MLA

Beer, Gavin De. Vertebrate Zoology. Sidgwick and jackson ltd, 1960.