Bell, John
Clarendon Press, 1992
Buku Teks
Cook, Ramsay
MacMillan of Canada, 1966
Buku Teks
Salvemini, Gaetano
W.W. Norton & Company, 1962
Buku Teks
by Andrew West [and others]
Fourmat Publishing, 1992
Buku Teks
Graham, Stuart
Cambridge University Press , 1994
Buku Teks