Matlin, Margareth W.
Holt, Rinehart and Winston, 1987
Buku Teks SO
edited by Joan C. Chrisler, Carla Golden, Patricia D. Rozee
McGraw-Hill, 2000
Buku Teks SO
Donelson, Frances Elaine
Mayfield Publishing Company, 1999
Buku Teks SO
Matlin, Margaret W.
Thomson, 2008
Buku Teks
Russell, Anne
Prentive-Hall, 1982
Buku Teks