Hall, H. R.
London: Methuen, [1924]
Buku Teks
Altekar, A.S.
Benares Nand Kishore & Bros 1948
Buku Teks
Stuart, Gene S.
Washington D.C. National Geographic Society 1988,
Buku Teks
Hitti, Philip K. (Philip Khuri), 1886-1978, author
MacMillan, 1974
Buku Teks
Arkell, A.J., author
University of London Press, 1961
Buku Teks