APA

Shepard P., . (1978). Thinking animals: animals and the development of human intelligence. New York: Viking Press.

Chicago

Shepard Paul, . 1978. Thinking animals: animals and the development of human intelligence. New York: Viking Press.

Harvard

Shepard P., . (1978). Thinking animals: animals and the development of human intelligence. New York: Viking Press.

MLA

Shepard Paul, . Thinking animals: animals and the development of human intelligence. New York: Viking Press. 1978.