Robinson, Alice M.
Prentice-Hall, 1982
Buku Teks
Uphold, Constance R.
Barmarrae Books, 1999
Buku Referensi
Christoper, Tom
Free Press, 1982
Buku Teks
Northouse, Peter G.
Prentice-Hall, 1985
Buku Referensi
editor-in-chief, Thomas J. Boll ; volume editors, Suzanne Bennett Johnson, Nathan W. Perry, Jr., and Ronald H. Rozensky
American Psychological, 2004
Buku Teks