by Thomas J. Sullivan ... [and others]
John Wiley & Sons, 1980
Buku Teks
May, John D.
Duxbury Press, 1972
Buku Teks
Ackoff, Russell Lincoln, 1919-
John Wiley & Sons, 1974
Buku Teks
edited by David Popenoe
Rutgers University Press, 1969
Buku Teks
Sullivan, Thomas J., 1944-
Macmillan, 1988
Buku Teks