Engle, T. L. (1958). Psychology: Its principles and application. Harcourt, Brace.
Cita Chicago Style (17a ed.)Engle, T. L. Psychology: Its Principles and Application. N. Y: Harcourt, Brace, 1958.
Cita MLA (9a ed.)Engle, T. L. Psychology: Its Principles and Application. Harcourt, Brace, 1958.
Precaución: Estas citas no son 100% exactas.