Swan, M. M., & Walter, C. C. (2019). Oxford english grammar course. Basic: A grammar practice book for elementary to pre-intermediate students of english with answers. Oxford University press.
Chicago Style (17th ed.) CitationSwan, M. Michael, and C. Catherine Walter. Oxford English Grammar Course. Basic: A Grammar Practice Book for Elementary to Pre-intermediate Students of English with Answers. Oxford: Oxford University press, 2019.
MLA (8th ed.) CitationSwan, M. Michael, and C. Catherine Walter. Oxford English Grammar Course. Basic: A Grammar Practice Book for Elementary to Pre-intermediate Students of English with Answers. Oxford University press, 2019.
Warning: These citations may not always be 100% accurate.