Santrock, John W., author
Worth Publishers, 1998
Buku Teks
Santrock, John W., author
McGraw-Hill, 2005
Buku Teks
Munn, Norman L., author
Houghton-Mifflin, 1961
Buku Teks
Wortman, Camille B., author
Alfred A. knoff, 1985
Buku Teks
Ciccarelli, Saundra K., author
Pearson - Prentice Hall, 2006
Buku Teks