Jones, Daniel
Cambridge english pronouncing dictionary
Cambridge University Press, 2003
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Webster's new international dictionary of the English language
William Allan Neilson, editor in chief; Thomas A. Knott, general editor; Paul W. Carhart, managing editor
Springfield, G & C Merriam Co.
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The Cambridge dictionary of psychology
general editor, David Matsumoto
Cambridge University Press, 2009
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Cambridge advanced learner's dictionary
Cambridge University Press, 2005
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Downes, Colm
Cambridge english for job hunting
Cambridge university press, 2009
 Buku Teks