Parsons, Richard D., author
Sage, 2014
Buku Teks
Egan, Gerard, author
Brooks/Cole, 1986
Buku Teks
Corey, Marianne Schneider, author
Brooks/Cole, 2003
Buku Teks
Egan, Gerard, author
Brooks, 2014
Buku Teks
Hackney, Harold, author
Allyn and Bacon, 2000
Buku Teks