APA (7th ed.) Citation

Soars, L., & Soars, J. (2009). American Headway 3: The world's most trusted English course (2a. ed.). Oxford University Press.

Chicago Style (17th ed.) Citation

Soars, Liz, and John Soars. American Headway 3: The World's Most Trusted English Course. 2a. ed. Nueva York: Oxford University Press, 2009.

MLA (9th ed.) Citation

Soars, Liz, and John Soars. American Headway 3: The World's Most Trusted English Course. 2a. ed. Oxford University Press, 2009.