Lambert, A. Vickie, author
Prentice Hall Englewood Cliffts , 1985
Buku Teks
Maddi, Salvatore R., author
AMACOM, 2005
Buku Teks
Barkley, Russell A., author
The Guilford Press, 2010
Buku Teks
Sichel, Deborah.,
William Morrow and Company, 1999
Buku Teks
edited by James D. Loy and Calvin B. Peters
Oxford University Press, 1991
Buku Teks