Argraffiad Saesneg gwreiddiol = Original English edition : Dunstable : Folens, 1997.
Addasiad Cymraeg gan = Welsh adaptation by : Iola Alban.
Bwdhaeth by Mary Green. ISBN 1853571547. Published by Canolfan Genedlaethol Addysg Grefyddol in 2000. Publication and catalogue information, links to buy online and reader comments.