Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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