Gasponi, Giancarlo, author
Euroedit-Trento, 1995
Buku Referensi
Hadas, Moses, author
Time-Life Books, 1965
Buku Teks
Bailey, Cyril
Oxford University Press, 1951.
Buku Teks
Carcopino, Jerome, author
Penguin Books, 1956
Buku Teks
Cary, M.
Macmillan, 1960
Buku Teks