Collins, James
The Bruce Publishing Company, 1954
Buku Teks
Bohler, Jochen
Oxford University Press, 2017
eBooks
Robinson, O.F.
Frofessional Books Limited, 1985
Buku Teks
edited by Edward Whiting Fox
Oxford University Press, 1957
Buku Teks
Benns, Lee F.
Appleton-Century-Crofts, 1955
Buku Teks