Beaumont, Henry
Longmans, Green and Co., 1945
Buku Teks
Ghiselli, Edwin E., author
McGraw-Hill, 1955
Buku Teks
edited by Edwin A. Fleishman
Dorsey Press, 1967
Buku Teks
Santrock, John W.
McGraw-Hill, 2003
Multimedia
Baron, Robert A., author
Simon & Schuster, 1992
Buku Teks