Sexton, Jared, autho
Palgrave Macmillan, 2017
Buku Teks
Prabhu, Anjali, author
Wiley Blackwell, 2014
Buku Teks
edited by Chi-Yun Shin & Julian Stringer
[Publisher not identified], [Date of publication not identified]
Buku Teks
edited by Chi-Yun Shin, Julian Stringer
Edinburgh University Press, 2005
Buku Teks
Campos, Patrick F, author
The University of the philippines Pres, 2016
Buku Teks