Piercy, Fred P.
The Guilford Press, 1986
Buku Teks
Welfel, Elizabeth Reynolds
Brooks/Cole Cengage Learning, 2013
Buku Teks
Sylvia D. Elvira
Balai Penerbit Fakultas Kedokteran Universitas Indonesia, 2005
Buku Teks
Strean, Herbert S.
Sage Publications, 1985
Buku Teks
American Psychology Association, 1996
Buku Teks