edited by William J. Dominik
Routledge, 1997
Buku Teks
Twining, William
Cambridge University Press, 2012
Buku Teks
Vancil, David L.
Allyn and Bacon, 1993
Buku Teks
Booth, Wayne C.
University of Chicago Press, 1983
Buku Teks
Sloane, Thomas O.
Oxford University Press, 2001
Buku Referensi