Myers, David G., author
Worth Publishers, 2001
Buku Teks
Myers, David G., author
Worth Publishers, 2015
Buku Teks
Santrock, John W., author
McGraw-Hill, 2005
Buku Teks
Burton, Lorelle, author
John Wiley & Sons Australia, 2009
Buku Teks
Haanel, Charles F, author
Mind Power Corporation, 2006
Buku Teks