Whitmore, T.C., author
Oxford University Press, 1986
Buku Teks
Funk & Wagnalls, 2000,
Buku Referensi
Priesley, John Boyton, 1894-
New York Harper & Brother 1939
Buku Teks
Cameron, Silver Donald, author
McClelland and Stewar, 1978
Buku Teks
Karnad, Girish Raghunanth
Oxford University Press , 2006
Buku Teks