Knapp, Mark L.
Allyn and Bacon, 1996
Buku Teks
DuBrin, Andrew J.
Pearson education International, 2009
Buku Teks
edited by Warren G. Bennis, Edgar H. Schei, and David E. Berlew
Dorsey Press, 1964
Buku Teks
edited by Warren G. Bennis ... [and others]
Dorsey Press, 1973
Buku Teks
Johnson, David W., 1940-
Prentice-Hall, 1987
Buku Teks SO