Argraffiad Saesneg gwreiddiol = Original English edition: London : Addison Wesley Longman, 1994.
Addasiad Cymraeg gan = Welsh adaptation by: Emily Huws.
Jac by Mick Gowar. ISBN 186085222X. Published by Uned Iaith Genedlaethol Cymru in 1997. Publication and catalogue information, links to buy online and reader comments.