Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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