Soars, L., Soars, J., Hancock, P., & Storton, R. (2019). Headway: Advanced Teacher's Guide (quinta edición.). Oxford University Press.
Chicago Style (17th ed.) CitationSoars, Liz, John Soars, Paul Hancock, and Richard Storton. Headway: Advanced Teacher's Guide. quinta edición. Oxford: Oxford University Press, 2019.
MLA (9th ed.) CitationSoars, Liz, et al. Headway: Advanced Teacher's Guide. quinta edición. Oxford University Press, 2019.
Warning: These citations may not always be 100% accurate.