Gasponi, Giancarlo, author
Euroedit-Trento, 1995
Buku Referensi
Hadas, Moses, author
Time-Life Books, 1965
Buku Teks
Steenbeek, Rosita, author
Antwerpen, 2008
Buku Teks
Bowra, C. M., author
Time-Life Books, 1965
Buku Teks
Russell, Richard Joel, author
Macmillan, 1954, 1951
Buku Teks