Soars, J., & Soars, L. (2004). New headway English course: Elementary Student's book. Oxford University Press.
Citazione stile Chigago Style (17a edizione)Soars, John, e Liz Soars. New Headway English Course: Elementary Student's Book. New York: Oxford University Press, 2004.
Citatione MLA (8a ed.)Soars, John, e Liz Soars. New Headway English Course: Elementary Student's Book. Oxford University Press, 2004.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.