Unnithan, T. K. N.
J. B. Wolters-Groningen, 1956
Buku Teks
Asia Publishing House, 1958
Buku Teks
Hanson, A.H.
Oxford University Press, 1966
Buku Teks
Murphy, Gardner, author
Basic Books, Inc., 1953
Buku Teks
Sarkar, Jagadish Narayan
Saraswati Library , 1976
Buku Teks