42
Aman, Sitti D.B. 2000. Other Folk Tales from Indonesia. Jakarta: Djambatan.
Eggins, Suzanne. 2004. An Introduction to Systemic Functional Linguistic 2nd Edition. New York: Continuum.
Francesconi, Sabrina. 2014. Reading Tourism Texts: A Multimodal Analysis. Google book: Channel View Publications.
Frank, Marcella. 1972. Modern English: Exercises for non-native speakers. New Jersey: Prentice Hall.
Gerot, Linda and Peter Wignell. 1994. Making Sense of Functional Grammar. Sydney: Southwood Press.
Halliday, Michael A.K. 1993. Some Grammatical Problems in Scientific English in M.A.K. Halliday and J.R. Martin 1993, Writing Science: Literacy and Discursive Power. London: The Falmer Press.
Johansson, Victoria. 2008. Lexical diversity and lexical density in speech and writing: a developmental perspective. Retrieved from http://journal.lub.lu.se/ (December 2014).
Knapp, Peter and Megan. 2005. Genre, Text, Grammar: Technologies for Teaching and Assessing Writing. Australia: UNSW Press.
Mustopo, Habib and AgusSuprijono. 2012. History. Translated by Eko Marsudiono. Bogor: Yudhistira.
43 Ramadani, Doni. 2011. The Analysis of Compound Sentence Found in the Jakarta post Newspaper. Unpublished Thesis. Medan: University of Sumatera Utara. Soepriatmadji, Liliek. 2011. Lexical Density dan Grammatical Intricacy Materi
Bacaan pada Buku Bahasa Inggris Kelas 6 SD. Retrieved from http://download.portalgaruda.org/article.php?article=7799&val=553
(December 2014).
Tambunan, Henny A. 2009.The Analysis of Lexical and Structural Ambiguity in Your Letters of The Jakarta Post. Unpublished Thesis. Medan: University of Sumatera Utara.
To, Vinh. 2013. Lexical Density and Readability: A Case Study of English Textbooks. Retrieved from http://aaref.com.au/en/publications/jurnal/ (December 2014).
