APA (7th ed.) Citation

Soars, J. &. L. (1996). Headway: Elementary(student's book) (7a ed.). Oxford University Press.

Chicago Style (17th ed.) Citation

Soars, John & Liz. Headway: Elementary(student's Book). 7a ed. Oxford, Inglaterra: Oxford University Press, 1996.

MLA (9th ed.) Citation

Soars, John & Liz. Headway: Elementary(student's Book). 7a ed. Oxford University Press, 1996.

Warning: These citations may not always be 100% accurate.