APA

Dixson A. F., . (1981). The natural history of the gorilla. New York: Columbia University Press.

Chicago

Dixson A F, . 1981. The natural history of the gorilla. New York: Columbia University Press.

Harvard

Dixson A. F., . (1981). The natural history of the gorilla. New York: Columbia University Press.

MLA

Dixson A F, . The natural history of the gorilla. New York: Columbia University Press. 1981.