APA

Stebbins R. C., Hendrickson J. R., . (1959). Field studies of amphibians in Colombia, South America. Berkeley, Calif. [u.a.]: Univ. of California Press.

Chicago

Stebbins Robert C, Hendrickson John Raymond, . 1959. Field studies of amphibians in Colombia, South America. Berkeley, Calif. [u.a.]: Univ. of California Press.

Harvard

Stebbins R. C., Hendrickson J. R., . (1959). Field studies of amphibians in Colombia, South America. Berkeley, Calif. [u.a.]: Univ. of California Press.

MLA

Stebbins Robert C, Hendrickson John Raymond, . Field studies of amphibians in Colombia, South America. Berkeley, Calif. [u.a.]: Univ. of California Press. 1959.