Cyhoeddiad Saesneg gwreiddiol = Original English ed.: Harlow: Longman Group, 1994.
Addasiad Cymraeg gan = Welsh adaptation by: Delyth George.
Ffion a'r ddau ffiaidd by Sally-Ann Lever. ISBN 1901358143. Published by Camfa in 1997. Publication and catalogue information, links to buy online and reader comments.