Hardy, W.G.
Schenkman Publishing Company Inc., 1962.
Buku Teks
Bailey, Cyril
Oxford University Press, 1951.
Buku Teks
Gibbon, Edward
Viking Press, 1955
Buku Teks
edited by Eva. R. Hoffman
Blackwell, 2007
Buku Teks
Robert Maynard Hutchins, editor in chief
Encyclopaedia Britannica, Inc., 1952
Buku Referensi