Susanna Mancini, Michel Rosenfeld, editor
Oxford University Press, 2014
Buku Teks
Stone, Geoffrey R.
Little, Brown and Company, 1991
Buku Teks
Wade, E.C.S. (Emlyn Capel Stewart)
Longmans Green, 1951
Buku Teks
Wade, E.C.S. (Emlyn Capel Stewart)
[publisher not identified], [date of publication not identified]
Buku Teks
Nowak, John E.
Thomson/West, 2010
Buku Teks