Brown, H.D., (1994), Teaching by Principles: an Interactive Approach to
Language Pedagogy, Englewood Cliffs, NJ: Prentice Hall Regents.

Burns, A., & Joyce, H., (1997), Focus on Speaking, Sydney: NationalCenter
for English Language Teaching and Research

Chamot, A. U., (1993), Student Responses to learning strategy instruction in
the foreign language classroom, Foreign Language Annals 26: 308-321.

Cohen, A. (1998). Developing the Ability to Perform Speech Acts.Studies in Second Language Acquisition, 18 (2), 253–267.

Harmer, J., (2001),How to Teach English, England: Addison Wesley
Longman

Hughes, Arthur, (1990), Testing for Language Teachers, Sydney:
CambridgeUniversity Press

Hughes, Rebecca. 2006. Spoken English, TESOL, and applied Linguistics:
Challenges for Theory and Practice. Great Britain: CPI Antony Rowe

Latief, M Adnan. 2012. Research Methods on Language Learning: An
Introduction. Malang: UM Press

Nunan, D. C., (1989), Designing Tasks for the Communicative Classroom,
Cambridge: CambridgeUniversity Press

Rickheit, Gert and Strohner, Hans. 2008. Handbook of Communication
Competence. Germany

Savignon, S.J., (1983), Communicative Competence: Theory and Classroom PracticeReading, MA: Addison-Wesley.

Thornbury, Scott and Diana Slade. 2007. Conversation: From Description to Pedagogy. New York: Cambridge University Press