REFERENCES
Alexander, L.G. 1988. Longman English Grammar. England: Pearson Education Limited, Edinburgh Gate, Harlow.
Artin, Feriana, Arjati. 2007. “An Error Analysis on the Use of Gerund among the Fourth Semester Students of English Department of Unnes in the Academic Year of 2006/2007”. Thesis.(Published). Semarang: Faculty of Languages and Arts Semarang State University.
Bog dan, Robert and Taylo, Steven, J. 1975.Introduction to Qualitative Research Methods (Third Edition): United State: Wiley Publishing press.
Crossman, Ashley. 2017. “Understanding Purposive Sampling: An Overview of the Method and its Applications”: Http://www.thoughtco.com/purposive- sampling-3026727. (Retrieved on January 21, 2018).
Eastwood, John. 1994. Oxford Guide to English Grammar. Hong Kong. Trades pools Ltd. Frome, Somerset.
Frank, Marcella. 1972. Modern English: A Practical Reference Guide. New Jersey:
Hill Book Company.
Frank, Marcella.1972. Modern English Exercise For Non-Native Speakers:
Sentences and Complex Structures:Part II Parts of Speech. New Jersey:
Prentice-Hall,Inc. Englewood Cliffts, New Jersey.
Fred, L. Perry. 2005. Research in Applied Linguistic. New Jersey: Lawrence Erlbaum Associates. Inc.
Hudson, 2003. “Gerunds without phrase structure. Natural Language and Linguistic Theory”.Journal 31:579-615.
Morley, David, A. 2000 .Syntax in Functional Grammar: An Introduction to Lexico grammar in Systematic Linguistics. London: Continuum Wellingthon House 125 Strand.
O’Grady, W. Archibald, J., Arronof, M., & Rees-Miller, J. 2010.Contemporary Linguistics: An Introduction. Boston: Bed ford/St. Martin’s.
Quirk, et al. 1989..An Introduction of Grammar in the English Language. London:
Longman Group Limited. 1973. “University Grammar of English”.
London: Longman, Inc.
Siahaan, Roselina. 2017. “The Functions of To Infinitive Phrase in Tempo English Editorials”. Thesis (Unpublished). Lampung: Faculty of Languages and Arts Universitas Teknokrat Indonesia.
Sameton. 2013. “The Analysis of Gerunds found in the Jakarta Post Neswpaper”.
Thesis (Published). Sumatera Utara: Universitas of Sumetera Utara.
Admin. Beritaduabahasa. 2018: Http://www.berita2bahasa.com/sc/?content=about.
(Retrieved on February 2, 2018).
