Swan, M., & Smith, B. (1991). Learner English: A teacher's guide to interference and other problems. Press Syndicate of the University of Cambridge.
Chicago Style (17th ed.) CitationSwan, Michael, and Bernard Smith. Learner English: A Teacher's Guide to Interference and Other Problems. Cambridge [Cambridgeshire]: Press Syndicate of the University of Cambridge, 1991.
MLA (9th ed.) CitationSwan, Michael, and Bernard Smith. Learner English: A Teacher's Guide to Interference and Other Problems. Press Syndicate of the University of Cambridge, 1991.
Warning: These citations may not always be 100% accurate.