Grant, Michael
Penguin Books, 1990
Buku Teks
Kritzick, James
Holt, Rinehart and Winston, 1964
Buku Teks
edited by Bernard Knox
W.W. Norton, 1993
Buku Referensi
edited by Robert Weaver
Oxford University Press, 1981
Buku Teks
edited by The Kokusai Bunka Shinkokai
Kokusai Bunka Shinkokai , 1972
Buku Teks