Tahkur, Ramesh, author
Westview Press, 1986
Buku Referensi
edited by Coral Bell
Australian National University Press, 1980
Buku Teks
Kaplan, Jacob J., author
N.Y. Frederick A. Praeger , 1968
Buku Teks
The Free Press, 1974
Buku Teks
edited by Jennie K. Lincoln and Elizabeht G. Ferris
Westview Press, 1984
Buku Teks