Basu, S.K.
Asia Publishing House , 1967
Buku Teks
Shekhar, K.C.
Vikas Pub. House, 1975
Buku Teks
edited by Benyamin Haggott Beckhart
Columbia Universary Press, 1954, 1956
Buku Teks
Lewis, Mervyn Keith
Philip Allan , 1987
Buku Teks
Halm, George N.
Richard D. Irwin, 1956
Buku Teks