Unesco, 1976
Buku Teks
edited by Michael Stohl and Harry R. Targ
Schenkman Publishing Company, 1982
Buku Teks
Lewis, William Arthur, 1915-
Princeton University Press, 1978
Buku Teks
Bulajic, Milan
Martinus Nijhoff, 1993
Buku Teks
Scalapino, Robert A.
American Enterprise Institute for Public Police, 1972
Buku Teks