Cita APA

Stebbins, R. C. (1954). Amphibians and reptiles of western North America. McGraw-Hill.

Citación estilo Chicago

Stebbins, Robert C. Amphibians and Reptiles of Western North America. New York: McGraw-Hill, 1954.

Cita MLA

Stebbins, Robert C. Amphibians and Reptiles of Western North America. New York: McGraw-Hill, 1954.