Johnson, Paul E. (Paul Erick), 1938-, author
John Wiley & Sons, 1971
Buku Teks
Schwartz, Barry, author
W.W. Norton, 2001
Buku Teks
Driscoll, Marcy P, author
Pearson Allyn and Bacon, 2005
Buku Teks
edited by Brian H. Ross
Elsevier, 2004
Buku Teks
Brannigan, Gary G., author
Prentice-Hall, 2000
Buku Teks