APA Citatie

Soars, J., & Soars, L. (2013). American Headway 4 (student practice): The world's most trusted English course. [Oxford]: Oxford University Press.

Chicago Style citaat

Soars, John, en Liz Soars. American Headway 4 (student Practice): The World's Most Trusted English Course. [Oxford]: Oxford University Press, 2013.

MLA citatie

Soars, John, en Liz Soars. American Headway 4 (student Practice): The World's Most Trusted English Course. [Oxford]: Oxford University Press, 2013.