APA (7th ed.) Citation

Bowler, B., & Cunningham, S. (1996). Headway: Upper-intermediate pronunciation. Oxford University press.

Chicago Style (17th ed.) Citation

Bowler, Bill, and Sarah Cunningham. Headway: Upper-intermediate Pronunciation. New york: Oxford University press, 1996.

MLA (9th ed.) Citation

Bowler, Bill, and Sarah Cunningham. Headway: Upper-intermediate Pronunciation. Oxford University press, 1996.