Arg. Saesneg gwreiddiol = Original English ed.: Llundain: Usborne Publishing, 1997.
Addasiad Cymraeg gan = Welsh adaptation by: Brenda Wyn Jones.
Llyfr crefftau sbonc a sbri by Richard Dungworth. ISBN 1859025439. Published by Gwasg Gomer in 1998. Publication and catalogue information, links to buy online and reader comments.