Argraffiad Saesneg gwreiddiol = Original English edition: London : Orchard Books, 2000.
Addasiad Cymraeg gan = Welsh adaptation by: Hedd a Non ap Emlyn.
Y goeden bisgedi siocled by Thomas Taylor. ISBN 1855964759. Published by Gwasg y Dref Wen in 2001. Publication and catalogue information, links to buy online and reader comments.