Bowler, B., & Bill Bowler; Sarah Cunningham. (1999). New Headway Pronunciation Course: Upper Intermediate. Oxford: Oxford University Press.
Trích dẫn kiểu ChicagoBowler, Bill, và Bill Bowler; Sarah Cunningham. New Headway Pronunciation Course: Upper Intermediate. Oxford: Oxford University Press, 1999.
MLA citiranjeBowler, Bill, và Bill Bowler; Sarah Cunningham. New Headway Pronunciation Course: Upper Intermediate. Oxford: Oxford University Press, 1999.
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