APA (7th ed.) Citation

Soars, L., Soars, J., & Maris, A. (2001). American headway 1: Teacher's book. Oxford University Press.

Chicago Style (17th ed.) Citation

Soars, Liz, John Soars, and Amanda Maris. American Headway 1: Teacher's Book. Oxford: Oxford University Press, 2001.

MLA (9th ed.) Citation

Soars, Liz, et al. American Headway 1: Teacher's Book. Oxford University Press, 2001.