APA (7th ed.) Citation

Bowler, B., & Cunningham, S. (1990). Headway: Intermediate pronunciation. Oxford University press.

Chicago Style (17th ed.) Citation

Bowler, Bill, and Sarah Cunningham. Headway: Intermediate Pronunciation. New york: Oxford University press, 1990.

MLA (9th ed.) Citation

Bowler, Bill, and Sarah Cunningham. Headway: Intermediate Pronunciation. Oxford University press, 1990.