Citazione Stile APA (7a Edizione)

Soars, L., & Soars, J. (1997). New headway english course: Intermediate workbook. Oxford University Press.

Citazione stile Chigago Style (17a edizione)

Soars, Liz, e John Soars. New Headway English Course: Intermediate Workbook. Oxford, Inglaterra: Oxford University Press, 1997.

Citatione MLA (9a ed.)

Soars, Liz, e John Soars. New Headway English Course: Intermediate Workbook. Oxford University Press, 1997.