APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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