Bobrow, Davis B.
Free Press, 1979
Buku Teks
Wilson, Amrit
Pluto Press ; Winchester, MA, USA : Distributed in the USA by Unwin Hyman, 1989
Buku Teks
Kusnitz, Leonard A
Greenwood Press, 1983
Buku Teks
Edward Edgar, 1994
Buku Teks
edited by Charles F. Herman, Charles W. Kegley, James N. Rosenau
Harper Collins Academic, 1987
Buku Teks