Citazione Stile APA (7a Edizione)

Engle, T. L. (1958). Psychology: Its principles and application. Harcourt, Brace.

Citazione stile Chigago Style (17a edizione)

Engle, T. L. Psychology: Its Principles and Application. N. Y: Harcourt, Brace, 1958.

Citatione MLA (9a ed.)

Engle, T. L. Psychology: Its Principles and Application. Harcourt, Brace, 1958.