Goshal, Kumar
Sheridan House Publisher, 1948
Buku Teks
Walker, E. A.
The University Press, 1945
Buku Teks
Keller, Albert Galloway
Ginn, 1908
Buku Teks
Gosden, Chris
Cambridge University Press, 2006
Buku Teks
Syed Hussein Alatas
Frank Cass, 1977
Buku Teks