edited by Matthew McKay and Kim Paleg
New Harbinger Publication , 1992
Buku Teks
Rutan, J. Scott, author
The Guilford Press, 2007
Buku Teks
Levine, Baruch
Prentince Hall, 1979
Buku Teks
Kaplan, Harold I., author
Williams & Wilklins , 1993
Buku Teks
Ettin, Mark F.
Allyn and Bacon, 1992
Buku Teks