Wren, W., & Lindsay, S. (2019). Cambridge Grammar And Writing Skills Learner's Book 6 (1st.). Cambridge University Press.
Chicago Style (17th ed.) CitationWren, Wendy, and Sarah Lindsay. Cambridge Grammar And Writing Skills Learner's Book 6. 1st. UK: Cambridge University Press, 2019.
MLA (9th ed.) CitationWren, Wendy, and Sarah Lindsay. Cambridge Grammar And Writing Skills Learner's Book 6. 1st. Cambridge University Press, 2019.
Warning: These citations may not always be 100% accurate.