Von der Mehden, Fred R., author
Prentice-Hall, 1964
Buku Teks
Kamrava, Mehran, author
Routledge , 2000
Buku Teks
editor by Jeannine Uppgard
Meckler Corporation , 1988
Buku Teks
Hardgrave, Robert L., author
Harcourt College, 2000
Buku Teks
King, M. H., author
Oxford University Press, 1978
Buku Teks