APA (7th ed.) Citation

Soars. (2004). New headway English course: Elementary student's book (International ed.). Oxford University Press.

Chicago Style (17th ed.) Citation

Soars. New Headway English Course: Elementary Student's Book. International ed. Oxford: Oxford University Press, 2004.

MLA (8th ed.) Citation

Soars. New Headway English Course: Elementary Student's Book. International ed. Oxford University Press, 2004.