Arg. Saesneg gwreiddiol = English ed.: New ed. Llundain: Macmillan Children's, 1996.
Addasiad Cymraeg gan = Welsh adaptation by: Rhian Pierce Jones.
Ms Swyn dan glo by Terence Blacker. ISBN 1859026095. Published by Gwasg Gomer in 1999. Publication and catalogue information, links to buy online and reader comments.