Hefferon, Kate, author
McGraw-Hill, 2011
Buku Teks
Halter, Albert N., 1927-, author
South-Western Publishing, 1971
Buku Teks
Schunk, Dale H., author
Prentice-Hall, 1996
Buku Teks
Nicholas Freudenberg, Susan Klitzman, Susan Saegert, editor
Jossey- Bass, 2009
Buku Teks
Azy Barak, editor
Cambridge University Press, 2008
Buku Teks