Argraffiad Saesneg gwreiddiol = Original English edition: London : Addison Wesley Longman, 1994.
Addasiad Cymraeg gan = Welsh adaptation by: Dylan Williams.
Stori heb ddiwedd iddi by Ben Butterworth. ISBN 1860852351. Published by Uned Iaith Genedlaethol Cymru in 1997. Publication and catalogue information, links to buy online and reader comments.