Cita APA (7th ed.)

Bowler, B., & Parminter, S. (2001). New headway pronunciation: Pre-intermediate. Oxford University Press.

Cita Chicago (17th ed.)

Bowler, Bill, i Sue Parminter. New Headway Pronunciation: Pre-intermediate. Oxford: Oxford University Press, 2001.

Cita MLA (9th ed.)

Bowler, Bill, i Sue Parminter. New Headway Pronunciation: Pre-intermediate. Oxford University Press, 2001.