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판 21개, 최신 판부터
Penguin Books, Limited, 2018, ISBN 9780241328583
Penguin Books, Limited, 2017, ISBN 9780141379524
Puffin Books, 2011, ISBN 9780141973661
Penguin Books, Limited, 2008, ISBN 9780141502526
Viking Juvenile, 2004, 양장(하드커버), ISBN 9780670058976
Viking Children's Books, 2003, 양장(하드커버), ISBN 9780670914005
Longman, 2001, 무선(페이퍼백), ISBN 9780582436565
Viking Juvenile, 1999, 보드북, ISBN 9780670882786
Bt Bound, 1999, 도서관 제본, ISBN 9780808528128
Viking, 1991, ISBN 9780670840182
Puffin, 1989, ISBN 9780140509199
Oliver & Boyd, 1989, ISBN 9780050044063
Puffin, 1986, ISBN 9780140506396
Scholastic, 1986, 무선(페이퍼백), ISBN 9780590405478
Scholastic, 1985, 무선(페이퍼백), ISBN 9780590335812
Perfection Learning Prebound, 1982, Unknown Binding, ISBN 9780812431001
Scholastic, 1981, 무선(페이퍼백), ISBN 9780590316217
Fontana, 1980, ISBN 9780006616788
Viking Press, 1979, ISBN 9780670287055
Viking Children's Books, 1978, 양장(하드커버), ISBN 9780722653357
Scholastic, 1978, ISBN 9780590410816