Brohier, R.L.
Lake House Investments, 1971
Buku Teks
Husain, Mahdi
Oriental Institute, 1953
Buku Teks
Ludowyk, E.F.C., author
Frederick A. Praeger, 1966
Buku Teks
Arasartnam, Sinnappah, author
Prentice-Hall, 1964
Buku Teks
Tresidder, Argus John
D. Van Nostrand Comp., 1960
Buku Teks