Saraswati, Sri Chandrasekharendra
Bharatiya Vidya Bhavan, 1966
Buku Teks
Herman, A.L.
Westview Press, 1991
Buku Referensi
O`Malley, L.S.S. (Lewis Sydney Steward), 1874-1941
Macmillan, Cambridge, ENg. University Press, 1935
Buku Teks
Ishwaran, Karigoudar
Westview Press, 1992
Buku Teks SO
Kingsland, Venika Mehra
Global Books , 1997
Buku Teks