Arg. Saesneg gwreiddiol = Original English ed.: Milton Keynes: Scripture Union, 1996.
Addasiad Cymraeg gan = Welsh adaptation by: Ann Bowen Morgan.
Diwrnod blin i Macsen by Brian Ogden. ISBN 1859941516. Published by Cyhoeddiadau'r Gair in 1998. Publication and catalogue information, links to buy online and reader comments.