Pauk, Walter, author
Houghton Mifflin, 1984
Buku Teks
Majors, Randall E., author
Prentice-Hall, 1997
Buku Teks
Ellis, Dave, author
Wadsworth and Cengage Learning, 2013
Buku Teks
edited by John N. Gardner and A. Jerome Jewler
Wadsworth, 1985
Buku Teks
Ayu Pratama Siantoro, author
Fakultas Psikologi Universitas Indonesia, 2012
UI - Skripsi (Open)