APA

Pickwell G. B., . (1972). Amphibians and reptiles of the Pacific States. New York: Dover Publications.

Chicago

Pickwell Gayle Benjamin, . 1972. Amphibians and reptiles of the Pacific States. New York: Dover Publications.

Harvard

Pickwell G. B., . (1972). Amphibians and reptiles of the Pacific States. New York: Dover Publications.

MLA

Pickwell Gayle Benjamin, . Amphibians and reptiles of the Pacific States. New York: Dover Publications. 1972.