APA (7th ed.) Citation

Lock, G. (1996). Functional English grammar: An introduction for second language teachers. Cambridge University Press.

Chicago Style (17th ed.) Citation

Lock, Graham. Functional English Grammar: An Introduction for Second Language Teachers. Cambridge ; New York: Cambridge University Press, 1996.

MLA (8th ed.) Citation

Lock, Graham. Functional English Grammar: An Introduction for Second Language Teachers. Cambridge University Press, 1996.