Argraffiad Saesneg gwreiddiol = Original English edition: Harlow : Longman Group, 1994.
Addasiad Cymraeg gan = Welsh adaptation by: Emily Huws.
Rholsen ffigys by Michael Rosen. ISBN 1860850286. Published by Uned Iaith Genedlaethol Cymru CBAC in 1996. Publication and catalogue information, links to buy online and reader comments.