Cita APA

Behler, J. L., & King, F. W. (1979). The Audubon Society field guide to North American reptiles and amphibians.

Citación estilo Chicago

Behler, John L., y F Wayne King. The Audubon Society Field Guide to North American Reptiles and Amphibians. 1979.

Cita MLA

Behler, John L., y F Wayne King. The Audubon Society Field Guide to North American Reptiles and Amphibians. 1979.