Argraffiad Saesneg gwreiddiol = Original English edition : Llandysul : Pont Books, 2004.
Addasiad Cymraeg gan = Welsh adaptation by : Elin Meek.
Beth sy, Jac? by Rob Lewis. ISBN 9781843234296. Published by Gwasg Gomer in 2005. Publication and catalogue information, links to buy online and reader comments.