Swan, M., & Smith, B. (1991). Learner English: A teacher's guide to interference and other problems. Press Syndicate of the University of Cambridge.
Citace podle Chicago (17th ed.)Swan, Michael, a Bernard Smith. Learner English: A Teacher's Guide to Interference and Other Problems. Cambridge [Cambridgeshire]: Press Syndicate of the University of Cambridge, 1991.
Citace podle MLA (9th ed.)Swan, Michael, a Bernard Smith. Learner English: A Teacher's Guide to Interference and Other Problems. Press Syndicate of the University of Cambridge, 1991.
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