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판 16개, 최신 판부터
MA Porrúa, 2019, 무선(페이퍼백), ISBN 9786075242934
University of Cambridge ESOL Examinations, 2019, ISBN 9780521730822
University of Cambridge ESOL Examinations, 2019, ISBN 9780521515207
Taylor & Francis Group, 2019, ISBN 9780367319229
Taylor & Francis Group, 2018, ISBN 9780429986178
Taylor & Francis Group, 2018, ISBN 9780429975097
Taylor & Francis Group, 2018, ISBN 9780429964015
Taylor & Francis Group, 2018, ISBN 9780429495465
Practical Action Publishing, 2017, ISBN 9781853399947
Practical Action Publishing, 2017, ISBN 9781853399954
Fernwood Publishing Co., Ltd., 2017, ISBN 9781552669754
Intermediate Technology, 1995, ISBN 9781853392955
Westview Press, 1995, ISBN 9780813317175
Franco Muzzio, 1991, 무선(페이퍼백), ISBN 9788870215410
Westview, 1987, ISBN 9781853390005
Westview Press, 1987, ISBN 9780813372846