Lock, G. (1996). Functional English grammar: An introduction for second language teachers. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Lock, Graham. Functional English Grammar: An Introduction for Second Language Teachers. Cambridge ; New York: Cambridge University Press, 1996.
Lua MLA (8ú heag.)Lock, Graham. Functional English Grammar: An Introduction for Second Language Teachers. Cambridge University Press, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.