Asian Journal of English Language Teaching
The Chinese University Press, 1996
 Majalah, Jurnal, Buletin
English Studies
Swets & Zeitlinger B.V., 1994
 Majalah, Jurnal, Buletin
Willis, Dave
Rules, patterns and words grammar and lexis in English language teaching
Cambridge University Press, 2003
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Vuoang, Tuan Duc
Colloquial Vietnamese: a complete languange course/ Tuan Duc Vuong and John More
Routledge , 1994
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The Explora: Journal of English Language Teaching (ELT) and Linguistics
English Department of Magister of Education Graduate School University of HKBP Nonmensen , 2015
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