Presidency of the Council of Ministers of the Republic of Italy, Information Service, 1962
Buku Teks
Pollard, John Francis, author
Routledge, 1998
Buku Teks
Lotz, Wolfgang
Yale University Press, 1995
Buku Teks
Diamond, Lucy, 1970-, author
Macmillan, 2014
Buku Teks
edited by Massimo Sargiacomo
McGraw-Hill, 2013
Buku Teks