Whitaker, Dorothy Stock
Routledge, 1994
Buku Teks
Haney, Hutch, author
Brooks/Cole, 2001
Buku Teks
Haney, James Hutchinson, author
Brooks/Cole Thomson Learning, 2001
Multimedia
Bion, W.R.
Basic Book, Inc. , 1961
Buku Teks
Corey, Marianne Schneider, author
Thomson/Brooks/Cole, 2006
Buku Teks