Sealey, Raphael
London The University of North Carolina Press 1990,
Buku Teks
Bowra, C. M.
Time-Life Books, 1965
Buku Teks SO
Shanks, Michael
Routledge, 1996
Buku Teks SO
Schulz, Fritz
Clarendon Press, 1954
Buku Teks
Eliot, Alexander
Time Incerperated, 1963
Buku Teks SO