by Frank A. Logan ... [and others]
Yale University Press, 1955
Buku Teks
Liebert, Robert M., 1942-, author
Prentice-Hall, 1995
Buku Teks
RAy, William J.
Wadsworth, 1985
Buku Teks
edited by Sigmund Koch, David E. Leary
APA, 2006
Buku Teks
McMahon, Frank B., author
The Dorsey Press, 1986
Buku Teks
Kimble, Gregory A., editor
MIT Press, 1996
Buku Teks