The Problem of The Study The Objective of The Study Based on the problems, this study was aimed: The Scope of The Study

B. SUGGESTIONS

In relations to the solutions, some constructive points wer suggested as the following. 1. The students of English Departement should know the factors and the process of language shift esspecially in communicating with tobanese in order to prevent misunderstanding. 2. It is suggested that the readers should know the factors and the process of language shift in order to aware them keep using their vernacular language and maintanance the vernacular language from the language loss esspecially Toba Language. REFERENCES Baker, Colin. 2001. Foundation Of Bilingual Education and Bilingualism. Britain: Library of Congress in Publication DataBiddles ltd. Chaer, Abdul and Agustina Leonie. 2004. Sosiolinguistik. Jakarta : Rineka Cipta Dweik, Bader. 2015. Language Shift Among the Assyrians of Jordan: A Sociolinguistic Study . Journal of Language, Linguistics and Literature, 1 4, 101-111. Fishman, Joshua A. 1991. Reversing Language Shift: Theoretical and Empirical Foundations of Assistance to Threatened Languages .. Arizona: University of Arizona Fishman, Joshua A. 1991. Sociolinguistics: Language loyalty, Continuity and Change . Arizona: University of Arizona Holmes, Janet. 2001. An Introduction T Sociolinguistics. Totthenam Kurt Road. London: Pearson Education. Horn, Ward G 2006. The Handbook of Pragmatics Victoria: Library ofConpss Cafaloging Hudyma, K. 2012. Language Maintanance and Shift: Case Study of Ukrainian in Saskatchewan. Saskatchewan : University of Saskatchewan Hutagalung, Cyber. 2015. Sejarah Perkembang Batak dan Sastra Batak Retrived from : http:hutagalungcyber. blogspot.co.id 2012 11 AksaraBatak.htmlsthash.XrB9hnAD.dpuf. May, 19 th 2016 [17.53] Immanuel, Hkbp. 2012. Aksara batak toba. Retrive from: http:hkbpimmanuelpekanbaru2.blogspot.co.id201212 .font-aksara- batak-toba-telah-bisa _30.html. May, 19 th 2016 [17.53] Jendra, Made. 2012. Sociolinguistics: The Study Of Societies’ Language. Jogjakarta 55823: Graha Ilmu. Khotari, C.R. 2008. Resarch Methodology; Methods and techniques. New Delhi, India: New Age International. Liu, Y. B. 2007. Home Language Shift and Its Implications for Language Planning in Singapore:From the Perspective of Prestige Planning. The Asia Pacific-Education Researcher . VOL. 16 2. 147-165 51