The Problems of the Study The Objectives of the Study The Scope of the Study

language instruction even as language communication though sometimes code switching cannot be avoided 2. The teachers or lecturers to use code switching in building up interpersonal relationship to the students 3. The other researcher who interested under the same topic that is code switching to explore more types of code switching or reasons to switch the code of a teacher or lecturer in order to add more knowledge of code switching. REFERENCES Appel, R., Muysken, P. 2006. Language Contact and Bilingualism. Amsterdam: University Press. Azwani, Meiny. 2012. Code-switching in Teaching English to Grade Eleven Students of Senior High School in Tebing Tinggi. A Thesis. English Applied Linguistics Study Program. Postgraduate School. State University of Medan. Beardsmore, H. B. 1982. Bilingualism: Basic Principles. Clevedon: Tieto. Bilgin, Guller Pinar. 2013. EFL Teachers’ Attitude toward Code Switching: A Turkish Setting. International Journal of Linguistics, 55, 3 Bogdan, R. C. Biklen, S.K. 1992. Qualitative Research for Education. Boston: Allyn and Bacon Chambers, F. 1991. Promoting Use of the Target Language in the Classroom. Language Learning Journal, 4, 27-31 Chaika, Elaine. 1994. Language the Social Mirror. Massachusetts, USA: Newbury House. Cohen, et. al. 2011. Research Methods in Education 7th ed.. London: Routledge. Cook, V. 2002. Portraits of the L2 User. Clevedon: Multilingual Matters. Costa, A. Santesteban, M. 2004. Lexical Access in Bilingual Speech Production: Evidence from Language Switching in Highly Proficient Bilinguals L2 Learners. Journal of Memory and Language, 50, 491-511 Creswell, J. W. 2009. Qualitative Inquiry Research Design: Choosing Among Five Approaches 3rd ed.. California: Sage. Creswell, J. W. Miller, D. L. 2000. Determining Validity in Qualitative Inquiry. Theory into Practice, 393, 124-131. Denzin, N. K. 1978. The Research Act: A theoretical Introduction to Sociological Methods. New York: McGraw-Hill. Ellis, R. 1994. The Study of Second Language Acquisition. Oxford: Oxford University Press. ` Fabbro, F. 2001. The Bilingual Brain: Bilingual Aphasia. Brain and Language Journal, 79, 201-210