Marshall, Geoffrey, author
Oxford University Press, 1957
Buku Teks
Digby, Margaret, author
Basil Blackwell , 1956
Buku Teks
Giblin, L.F., author
University Press, 1951
Buku Teks
Rangaswami, G.
Prentice Hall of India, 1987
Buku Teks
Clarendon Press , 1954
Buku Teks