Nelson-Jones, Richard
Brooks/Cole , 1990
Buku Teks
Warren G. Bennis; Edgar H. Schei; and David E. Berlew
The Dorsey Press, 1964
Buku Teks
Seleebey, Dennis
Columbia University Press, 2001
Buku Teks
Basic Books, 1956
Buku Teks
Johnson, David W., 1940-
Prentice-Hall, 1987
Buku Teks