edited by Anne Roe and George Gaylord Simpson
Yale University Press, 1961
Buku Teks
Kalish, Richard A.
Wadsworth, 1966
Buku Teks
Staats, Arthur W.
Holt, Rinehart and Winston, 1964
Buku Teks
Winston, Robert M.L.
BBC Worldwide Limited, 2004
Multimedia
Winston, Robert M.L.
BBC Worldwide Limited, 2004
Multimedia