Balakrishna, R.
Bangalore Printing & Pub. Co., 1948
Buku Teks
Levin, Melvin R
Praeger, 1977
Buku Teks
Sewell, R.
Asian Educational Services, 1987
Buku Teks
edited by John Friedmann and William Alonso
MIT Press, 1965
Buku Teks
Hall, Peter, author
Routledge, 1992
Buku Teks