Kottke, Frederic J.
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Buku Referensi
Wong, Donna L., 1948-
Mosby , 1986
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Heimburger, Douglas C.
Mosby Elsevir , 2006
Buku Teks
editor-in-chief, Thomas J. Boll ; volume editors, Suzanne Bennett Johnson, Nathan W. Perry, Jr., and Ronald H. Rozensky
American Psychological, 2004
Buku Teks
edited by Patti Rager Zuzelo
Jones and Bartlett Publishers, 2010
Buku Teks