Wang, James C.F., author
Prentice-Hall, 1985
Buku Teks
Roberts, Geoffrey
Manchester University Press, 1984
Buku Teks
edited by Stephen K. Bailey
United States Information Agency, 1973
Buku Teks
Kearney, Robert N.
Cornell University Press, 1973
Buku Teks
Singh, Bilveer, 1956-, author
McGraw-Hill, 2012
Buku Teks