Murphy, Raymond, author
Cambridge University Press, 1998
Buku Teks
Hewings, Martin, author
Cambridge University Press, 2005
Buku Teks
edited by Jon Yong-pyo
Siganemule, 2010
Buku Teks
Hewings, Martin, author
Cambridge University Press, 2006
Buku Teks
Straus, Jane
Jossey-Bass, 2008
Buku Teks