Sheridan, Charles L.
Wiley , 1992
Buku Teks
Wiley Periodicals, Inc, 2004
Majalah, Jurnal, Buletin
Taylor, Shelley E., author
McGraw-Hill, 2012
Buku Teks
Edited by S. Maes, H. Leventhal and M. Johnston
John Wiley & Sons, 1993
Buku Teks
editor-in-chief, Thomas J. Boll
American Psychological Association, 2004
Buku Teks