Basu, S.K.
Macmillan Press, 1974
Buku Teks
Basu, S.K.
Asia Publishing House , 1967
Buku Teks
Shekhar, K.C., author
Vikas Pub. House, 1975
Buku Teks
edited by Benyamin Haggott Beckhart
Columbia Universary Press, 1954, 1956
Buku Teks
Lewis, M. K. (Mervyn Keith), author
Philip Allan , 1987
Buku Teks