APA (7th ed.) Citation

Nation, I. S. P., Long, M. H., & Richards, J. C. (2001). Learning vocabulary in another language. Cambridge University Press.

Chicago Style (17th ed.) Citation

Nation, I. S. P., Michael H. Long, and Jack C. Richards. Learning Vocabulary in Another Language. Cambridge: Cambridge University Press, 2001.

MLA (9th ed.) Citation

Nation, I. S. P., et al. Learning Vocabulary in Another Language. Cambridge University Press, 2001.