Hewings,Martin. (1999). Advanced Grammar in Use: A self-study reference and practice book for advanced learners of English / Martin Hewings. Cambridge.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHewings,Martin. Advanced Grammar in Use: A Self-study Reference and Practice Book for Advanced Learners of English / Martin Hewings. Cambridge, 1999.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHewings,Martin. Advanced Grammar in Use: A Self-study Reference and Practice Book for Advanced Learners of English / Martin Hewings. Cambridge, 1999.
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