May, Rollo, 1909-
W.W. Norton, 1953
Buku Teks SO
Childe, V. Gordon
A Mentor Book, 1951
Buku Teks SO
May, Rollo, 1909-
W.W. Norton, 2009
Buku Teks SO
May, Rollo, 1909-
Dell Publishing Co., Inc., 1953
Buku Teks SO
Fromm, Erich
Fawcett Priemer Book, 1947
Buku Teks SO