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판 10개, 최신 판부터
Clarion Books, 2008, 양장(하드커버), ISBN 9780618894994
Clarion Books, 2006, ISBN 9780618836857
Clarion Books, 2005, Audio CD, ISBN 9780618709083
Tandem Library, 1999, School & Library Binding, ISBN 9780881035636
Heinemann, 1987, ISBN 9780434939084
Perfection Learning Prebound, 1985, Unknown Binding, ISBN 9780812442380
Clarion Books, 1981, 무선(포켓판), ISBN 9780317043235
Clarion Books, 1981, 무선(페이퍼백), ISBN 9780899190358
Clarion Books, 1979, ISBN 9780395288122
World's Work, 1974, ISBN 9780437425133