Sholapurkar, Amar A., author
Jaypee Brothers Pvt. Ltd., 2011
Buku Teks
Goddard, Ken, author
The Bath Press, 1995
Buku Teks
Lindsay, David, author
Longman, 1995
Buku Teks
Barnet, Sylvan, author
Little, Brown, 1980
Buku Teks
Day, Robert A., author
ISI Press, 1983
Buku Teks