Macpherson, Gavin, author
Longman, 1993
Buku Teks
Dunn, James A.
MIT Press, 1981
Buku Teks
Wright, Paul H., author
John Wiley & Sons, 2004
Buku Teks
Oglesby, Clarkson H. (Clarkson Hill), 1908-, author
John Wiley & Sons, 1963
Buku Teks
Singh, Gurcharn, author
Standard Publishers Distributors, 1978
Buku Teks