Bhalla, G. S.
National Book Trust,, 2007
Buku Teks
New Delhi, India : Indian Council for Cultural Relation
Majalah, Jurnal, Buletin
Aiyer, A.K. Yegana Narayan
The Bangalore Printing & Publishing, 1951
Buku Teks
edited by Joan Davidson and Richard Lloyd
John Wiley & Sons, 1979
Buku Teks
Hammonds, Carsie, 1894-
Mcgraw-Hill , 1950
Buku Teks