Rahul, Ram
Vikas, 1982
Buku Teks
Dallin, David J.
Yale University Press, 1949
Buku Teks
edited by Donald S. Zagoria
Yale University Press, 1982
Buku Teks
Weigh, Ken Shen
The Coomercial Press , 1928
Buku Teks
Griffith, William E., author
MIT Press, 1965
Buku Teks