Lock, G. (1996). Functional English grammar: An introduction for second language teachers. Cambridge University Press.
芝加哥风格引文Lock, Graham. Functional English Grammar: An Introduction for Second Language Teachers. Cambridge ; New York: Cambridge University Press, 1996.
MLA引文Lock, Graham. Functional English Grammar: An Introduction for Second Language Teachers. Cambridge University Press, 1996.
警告：这些引文格式不一定是100％准确.