edited by John L. Sheppard
Camberland Collegge of Health, 1984
Buku Teks
Sarah A. Raskin, editor
Guilford Press, 2011
Buku Teks
edited by Laura A. Cushman and Marcia J. Scherer
American Psychological Association, 1995
Buku Teks
Hoeman, Shirley P., author
Mosby , 1996
Buku Teks
Orto, Arthur E. Dell, editor
Macmillan Lib., 1995
Buku Referensi