DiMatteo, M. Robin, author
Allyn and Bacon, 2002
Buku Teks
Taylor, Shelley E., author
McGraw-Hill, 1995
Buku Teks
Edited by S. Maes, H. Leventhal and M. Johnston
John Wiley & Sons, 1993
Buku Teks
Sarafino, Edward P., author
John Wiley & Son, 2012
Buku Teks
Sarafino, Edward P., author
John Wiley & Sons, 1990
Buku Teks