Wesson, Robert G
Houghton mifflin, 1977
Buku Teks
Korany, Bahgat, author
Westview Press, 1984
Buku Teks
edited by Youngnok Koo and Sung-joo Han
Columbia University Press, 1985
Buku Teks
Franck, Thomas M., author
Oxford University Press, 1979
Buku Teks
Langdon, Robert M., author
Littlefield Adams, 1961
Buku Teks