ロロ・メイ
Rank, Otto, A Psychology of Difference: The American Lectures [talks given 1924–1938; edited and with an introductory essay by Robert Kramer], Princeton University Press 1996 (ISBN 0-691-04470-8).
Friedman, Howard S. and Miriam W. Schustack, Personality: Classic Theories and Modern Research, Boston: Pearson Allyn & Bacon, 2012 (ISBN 9780205050178).