Cambridge University Press, 2014
Buku Teks
Crawford, James, author
Oxford University press, 2006
Buku Teks
Sornarajah, M, author
Cambridge University Press, 2017
Buku Teks
Schill, Stephan W., author
Cambridge University press, 2009
Buku Teks
Schil, Stephen W., author
Cambridge University Press, 2013
Buku Teks