Ζακόπουλος, Α. Ν. (1975). Plato on man: A summary and critique of his psychology with special reference to pre-platonic, freudian, behavioristic, and humanistic psychology. New York: Philosophical Library.

Ζακόπουλος, Αθηναγόρας Νικόλαος. Plato On Man: A Summary and Critique of His Psychology With Special Reference to Pre-platonic, Freudian, Behavioristic, and Humanistic Psychology. New York: Philosophical Library, 1975.

Ζακόπουλος, Αθηναγόρας Νικόλαος. Plato On Man: A Summary and Critique of His Psychology With Special Reference to Pre-platonic, Freudian, Behavioristic, and Humanistic Psychology. New York: Philosophical Library, 1975.