May, R. (1967). Psychology and the human dilemma. Van Nostrand.
Cita Chicago (17th ed.)May, Rollo. Psychology and the Human Dilemma. Princeton, N.J: Van Nostrand, 1967.
Cita MLA (9th ed.)May, Rollo. Psychology and the Human Dilemma. Van Nostrand, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.