Wren, W., & Lindsay, S. (2019). Cambridge Grammar And Writing Skills Learner's Book 6 (1st.). Cambridge University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWren, Wendy, और Sarah Lindsay. Cambridge Grammar And Writing Skills Learner's Book 6. 1st. UK: Cambridge University Press, 2019.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWren, Wendy, और Sarah Lindsay. Cambridge Grammar And Writing Skills Learner's Book 6. 1st. Cambridge University Press, 2019.
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