APA

Porteus S. D., . (1937). Primitive intelligence and environment. New York: Macmillan.

Chicago

Porteus Stanley David, . 1937. Primitive intelligence and environment. New York: Macmillan.

Harvard

Porteus S. D., . (1937). Primitive intelligence and environment. New York: Macmillan.

MLA

Porteus Stanley David, . Primitive intelligence and environment. New York: Macmillan. 1937.