APA (7th ed.) Citation

Soars, J. &. L. (1993). Headway: Elementary (student's book) (1a ed.). Oxford University Press.

Chicago Style (17th ed.) Citation

Soars, John & Liz. Headway: Elementary (student's Book). 1a ed. Oxford, Inglaterra: Oxford University Press, 1993.

MLA (9th ed.) Citation

Soars, John & Liz. Headway: Elementary (student's Book). 1a ed. Oxford University Press, 1993.

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