Natarajan, A.
Asia Publishing House, 1959
Buku Teks
Clarendon Press, 1971
Buku Teks
Pearson Longman, 2008
Buku Teks
Epstein, T. Scarlett, author
Manchester University Press , 1962
Buku Teks
Rosen, George, author
University California Press, 1966
Buku Teks