Jaschke, H. A.
Trubner and Co. Ludgate Hill, 1882
Buku Referensi
Jaschke, H. A.
Curzon Press, 1998
Buku Referensi
Chesterman, Andrew
Cambridge University Press, 1991
Buku Teks
Tarlekar, G. H.
Motial Banarsidass Publishers, 1991
Buku Teks
Nowak, Norman D.
Praeger, 1970
Buku Teks