edited by Raymond P. Lorion
American Psychology Association, 1996
Buku Teks
Koocher, Gerald P., author
Oxford University Press, 1998
Buku Teks
Philips, Beeman N.
Jassey-Bass , 1990
Buku Teks
edited by Gregory A. Kimble, Michael Wertheimer, Charlotte White
American Psychological Association, 1991
Buku Teks
Milburn, Michael A.
California Brooks/Cole Pub. , 1991
Buku Teks