Bauer, Raymond A., author
Harvard University Press, 1952; 1959
Buku Teks
Hough, Jerry F.
The Brookings Institution, 1980
Buku Teks
Brzezinski, Zbigniev K., author
Frederick A. Praeger, 1962
Buku Teks
Frederick A, Praeger; George Allen and Unwin Ltd., 1964
Buku Teks
Foreign Languages Publishing, [date of publication not identified]
Buku Teks