Dubhashi, P. R.
Sage Publications, 1986
Buku Teks
Carl C. Taylor ... [and others]
Orient Longmans, 1965
Buku Teks
Nair, Kusum
Praeger Publishers, 1969
Buku Teks
Nair, Kusum
Praeger, 1966
Buku Teks
edited by M.S. Swaminathan
Academic Foundation, 2007
Buku Teks