Quennell, Peter
New York The Viking Press 1941
Buku Teks
Instituto Poligrafico dello Stato, 1974
Buku Teks
Bethcherman, Lita-Rose
Fitzhenry & Whiteside, 1975
Buku Teks
Presidency of the Council of Ministers of the Republic of Italy, Information Service, 1962
Buku Teks
Lotz, Wolfgang
Yale University Press, 1995
Buku Teks