21 .
Terkourafi, M. (2005). An argument for a frame-
based approach to politeness.
Broadening the horizon of linguistic politeness ,
139 , 99.
Wang, N., Johnson, W. L., & Gratch, J. (2010, June).
Facial expressions and politeness effect in
foreign
language
training
system.
In
International Conference on Intelligent Tutoring Systems (pp. 165-173). Springer,
Berlin, Heidelberg.
Watts, RJ (2003).
Kesopanan . Cambridge University
Press.
Weaver, R., & Hybells, S. (2007).
Communicating effectively . Boston: McGraw Hill.
Wijayanto, A., Laila, M., Prasetyarini, A., & Susiati,
S. (2013). Politeness in Interlanguage
Pragmatics of Complaints by Indonesian
Learners
of
English.
English Language Teaching ,
6 (10), 188-201.