Addasiad Cymraeg gan = Welsh adaptation by : Catrin Evans.
Argraffiad Saesneg gwreiddiol = Original English edition : Edinburgh : Barrington Stoke Ltd, 2000.
O ddrwg i waeth by Anthony Masters. ISBN 1843232332. Published by Gwasg Gomer in 2003. Publication and catalogue information, links to buy online and reader comments.