APA (7th ed.) Citation

Soars. (2014). New Headwway: Upper-intermediate student's book (4th ed.). Oxford Unoversity Press.

Chicago Style (17th ed.) Citation

Soars. New Headwway: Upper-intermediate Student's Book. 4th ed. United Kingdom: Oxford Unoversity Press, 2014.

MLA (8th ed.) Citation

Soars. New Headwway: Upper-intermediate Student's Book. 4th ed. Oxford Unoversity Press, 2014.