Bowler, B., & Cunningham, S. (1991). Headway, Upper-Intermediate: Pronunciation. Oxford: Oxford University Press.
Chicago Style CitationBowler, Bill, i Sarah Cunningham. Headway, Upper-Intermediate: Pronunciation. Oxford: Oxford University Press, 1991.
Cita MLABowler, Bill, i Sarah Cunningham. Headway, Upper-Intermediate: Pronunciation. Oxford: Oxford University Press, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.