Rajan, Mohan Sundara
Asian Development Bank, 1986
Buku Teks
Joshi, Akshay
Knowledge World, 2001
Buku Teks
Besserer, C. W.
Prentice-Hall, 1959
Buku Teks
Ching, Francis D.K., 1943-
John Wiley & Son, 2007
Multimedia
Dixit, J. N. (Jyotindra Nath), 1936-2005
Routledge, 2002
Buku Teks