Ibbotson, Mark
Cambridge English for engineering
Cambridge University Press, 2008
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James, C.V.
Business studies / C. V. James
Prentice-Hall, 1992
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Jaderstrom, Susan
Business English at work
McGraw-Hill Glencoe, 2003
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Koneru, Aruna
English language skills
Tata McGraw-Hill, 2011
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Hasibuan, Sofia
English for specific purposes : economics
Gramedia, 1986
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