Bowler, B., & Parminter, S. (2001). New headway pronunciation: Pre-Intermediate : Student's practice book. Oxford: Oxford Univ. Press.
Chicago Style aipamenaBowler, Bill, và Sue Parminter. New Headway Pronunciation: Pre-Intermediate : Student's Practice Book. Oxford: Oxford Univ. Press, 2001.
MLA aipamenaBowler, Bill, và Sue Parminter. New Headway Pronunciation: Pre-Intermediate : Student's Practice Book. Oxford: Oxford Univ. Press, 2001.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.