Etherton, Michael
Macmillan, 1989
Buku Teks
Capone, Giovanna
University of Queensland Press , 1991
Buku Teks
Cambridge University Press, 1988
Buku Teks
edited by Hersh Zeifman and Cynthia Zimmerman
Macmillan, 1993
Buku Teks
F.W. Cheshire, 1962
Buku Teks