Ag. Bambang Setiyadi
Teaching language skills : preparing materials and selecting techniques
Graha Ilmu, 2018
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Describing the foreign language skills of catalogers in academic libraries Jefrey Beall
Artikel Jurnal
Douglas, Dan
Assessing language for specific purposes
Cambridge University Press, 2000
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Pattison, Tania
Critical reading english for academic purposes
Pearson , 2015
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Research perspectives on english for academic purposes
John Flowerdew, Matthew Peacock
Cambridge University Press, 2001
Buku Teks SO