Choudhuri, Devika Dibya
Brooks/Cole Cengage Learning, 2012
Buku Teks SO
editors, Joseph G. Ponterotto, J. Mannuel Casas, Lisa A. Suzuki, Charlene M. Alexander
Sage Publications, 2001
Buku Referensi
editors, Edward C. Chang, Christina A. Downey
Springer, 2012
eBooks
Pack-Brown, Sherlon P.
Sage, 2003
Buku Teks SO
Ivey, Allen E.
Allyn and Bacon, 1996
Buku Teks SO