APA (7th ed.) Citation

Nation, I. S. P. (2011). Learning vocabulary in another language (1st published, 13th printing.). Cambridge University Press.

Chicago Style (17th ed.) Citation

Nation, I. S. P. Learning Vocabulary in Another Language. 1st published, 13th printing. Cambridge [etc.]: Cambridge University Press, 2011.

MLA (9th ed.) Citation

Nation, I. S. P. Learning Vocabulary in Another Language. 1st published, 13th printing. Cambridge University Press, 2011.