Argraffiad Saesneg gwreiddiol = Original English edition : London : Orchard Books, 2000.
Addasiad Cymraeg gan = Welsh adaptation by : Dylan Williams.
Hyfforddi hirben by Michael Coleman. ISBN 1902416708. Published by Cymdeithas Lyfrau Cerdigion in 2003. Publication and catalogue information, links to buy online and reader comments.