APA (7th ed.) Citation

Soars, J., & Soars, L. (1989). Headway: Student's book : advanced. Oxford University Press.

Chicago Style (17th ed.) Citation

Soars, John, and Liz Soars. Headway: Student's Book : Advanced. Oxford: Oxford University Press, 1989.

MLA (9th ed.) Citation

Soars, John, and Liz Soars. Headway: Student's Book : Advanced. Oxford University Press, 1989.