Cottone, R. Rocco, author
Allyn & Bacon, 1992
Buku Teks
Corey, Gerald, author
Brooks/Cole, Cengage Learning, 2012
Buku Teks
editors, Joseph G. Ponterotto, J. Mannuel Casas, Lisa A. Suzuki, Charlene M. Alexander
Sage Publications, 2001
Buku Referensi
Corey, Gerald, author
Thomson Wadsworth, 2005
Buku Teks
edited by Shelagh Brumfitt
Wiley - Blackwell, 2010
Buku Teks