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판 7개, 최신 판부터
Little, Brown and Co., 2011, ISBN 9780316099028
Edmonton Public Schools, Resource Development Services, 2002, Unknown Binding, ISBN 9781553780243
Tandem Library, 1999, School & Library Binding, ISBN 9780808578376
Puffin, 1994, ISBN 9780140373011
Penguin Books, 1993, 양장(하드커버), ISBN 9780140323801
Hamilton, 1986, ISBN 9780241117699
Little, Brown, 1985, ISBN 9780316195553