APA (7th ed.) Citation

Numan, D., & Nunan, D. (1992). Research methods in language learning. Cambridge University Press.

Chicago Style (17th ed.) Citation

Numan, David, and D. Nunan. Research Methods in Language Learning. Cambridge: Cambridge University Press, 1992.

MLA (8th ed.) Citation

Numan, David, and D. Nunan. Research Methods in Language Learning. Cambridge University Press, 1992.