Addasiad Cymraeg gan = Welsh adaptation by : Gwynne Williams.
Argraffiad Saesneg gwreiddiol = Original English edition: London : Hodder Children's Books, 2001.
Ianto a Roli by Mick Inkpen. ISBN 1855965216. Published by Dref Wen in 2002. Publication and catalogue information, links to buy online and reader comments.