Sellen, Derek
Skills in action : english language techniques for the JMB test and other academic purposes
Hulton Educational Publications, 1982
 Buku Teks SO
Smith, J. Mike
A study skills handbook
Oxford University Press, 1990
 Buku Teks SO
Research perspectives on english for academic purposes
John Flowerdew, Matthew Peacock
Cambridge University Press, 2001
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Callow, Margaret
Heinemann integrated skills elementary / Margaret Callow
Heinemann Educational Books, 1990
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Building English skills yellow level / prepared by Staff of the Writing Improvement Project
Illinois McDougal, 1977
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