Citazione Stile APA (7a Edizione)

Soars, L., & Soars, J. (1998). New headway english course. Oxford University Press.

Citazione stile Chigago Style (17a edizione)

Soars, Liz, e John Soars. New Headway English Course. Oxford: Oxford University Press, 1998.

Citatione MLA (8a ed.)

Soars, Liz, e John Soars. New Headway English Course. Oxford University Press, 1998.