Brody, Ralph
Human Science Press, 1982
Buku Teks
edited by Harold J. Burbach
Pendell, 1977
Buku Teks
Sower, Christopher
Free Press, 1957
Buku Teks
Ecklein, Joan Levin, author
John Wiley & Sons, 1972
Buku Teks
Hardina, Donna, author
Columbia University Press, 2002
Buku Teks