Fitzgerald, C.P.
Frederick A. Praeger Publishers, 1961
Buku Teks
Bowle, John
Jonathan Cape Thirty Bedford Square, 1949
Buku Teks
edited by Joachim Herrmann, Joachim Herrmann and Erik Zurcher
Routledge, 1996
Buku Referensi
edited by A.H. Dani and J.P. Mohen
Routledge , 1996
Buku Referensi
Raychoudhary, S.C.
Surjeet Publications, 1984
Buku Teks