Arg. Saesneg gwreiddiol = Original English ed.: Harlow: Longman Group, 1994.
Addasiad Cymraeg gan = Welsh adaptation by: Emily Huws.
Hawdd pawdd i Cadi Cwng-ffw by Sally-Ann Lever. ISBN 1860853188. Published by Uned Iaith Genedlaethol Cymru in 1998. Publication and catalogue information, links to buy online and reader comments.