Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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