APA

Kagan J., Havemann E., . (1968). Psychology; an introduction. New York: Harcourt, Brace & World.

Chicago

Kagan Jerome, Havemann Ernest, . 1968. Psychology; an introduction. New York: Harcourt, Brace & World.

Harvard

Kagan J., Havemann E., . (1968). Psychology; an introduction. New York: Harcourt, Brace & World.

MLA

Kagan Jerome, Havemann Ernest, . Psychology; an introduction. New York: Harcourt, Brace & World. 1968.