Ivey, Allen E.
Allyn and Bacon, 1996
Buku Teks
Corey, Gerald
Cengage Learning, 2017
Buku Teks
Cottone, R. Rocco
Allyn & Bacon, 1992
Buku Teks
Raymond A. Levy, editor
[, Springer], 2012
eBooks
Wheeler, Kathleen, 1947-
Springer Publishing Company, 2014
Buku Teks