APA (7th ed.) Citation

Stern, H. H., Allen, P., & Harley, B. (1992). Issues and options in language teaching. Oxford University Press.

Chicago Style (17th ed.) Citation

Stern, H. H., Patrick Allen, and Birgit Harley. Issues and Options in Language Teaching. Oxford: Oxford University Press, 1992.

MLA (9th ed.) Citation

Stern, H. H., et al. Issues and Options in Language Teaching. Oxford University Press, 1992.