Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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