Walker, E. A.
The University Press, 1945
Buku Teks
Majumdar, R.C.
General Printers, 1944
Buku Teks
Keller, Albert Galloway
Ginn, 1908
Buku Teks
Wareing, John
Oxford University Press, 2017
eBooks
Maunier, Rene
Routledge & Kegan Paul Limited, 1949
Buku Teks