Lines, Dennis, author
Sage, 2002
Buku Teks
Lines, Dennis, author
Sage , 2006
Buku Teks
Sharf, Richard S., author
Brooks/Cole Cengage Learning, 2012
Buku Teks
editors, Allen E. Bergin, Sol L. Garfield
John Wiley & Sons, 1994
Buku Referensi
edited by Allen E. Bergin, Sol L. Garfield
John Wiley & Sons, 1994
Buku Referensi