APA

Duellman W. E., . (1999). Patterns of distribution of amphibians. Baltimore: Johns Hopkins University Press.

Chicago

Duellman William Edward, . 1999. Patterns of distribution of amphibians. Baltimore: Johns Hopkins University Press.

Harvard

Duellman W. E., . (1999). Patterns of distribution of amphibians. Baltimore: Johns Hopkins University Press.

MLA

Duellman William Edward, . Patterns of distribution of amphibians. Baltimore: Johns Hopkins University Press. 1999.