APA (7e ed.) Bronvermelding

Soars, L., Soars, J., Hancock, P., & Storton, R. (2019). Headway: Advanced Teacher's Guide (quinta edición.). Oxford University Press.

Chicago (17e ed.) Bronvermelding

Soars, Liz, John Soars, Paul Hancock, en Richard Storton. Headway: Advanced Teacher's Guide. quinta edición. Oxford: Oxford University Press, 2019.

MLA (9e ed.) Bronvermelding

Soars, Liz, et al. Headway: Advanced Teacher's Guide. quinta edición. Oxford University Press, 2019.