Instituto Poligrafico dello Stato, 1974
Buku Teks
Durant, Will
Simon and Schuster, 1953
Buku Teks
Burckhardt, Jacob
Harper Torchbooks, 1968
Buku Teks
Burckhardt, Jacob
Harper & Row Publisher, 1958.
Buku Teks
ENIT, [date of publication not identified]
Buku Teks