Goshal, Kumar
Sheridan House Publisher, 1948
Buku Teks
Walker, E. A.
The University Press, 1945
Buku Teks
Majumdar, R.C., author
General Printers, 1944
Buku Teks
Keller, Albert Galloway, author
Ginn, 1908
Buku Teks
Wareing, John, author
Oxford University Press, 2017
eBooks