Arg. Saesneg gwreiddiol = Original English ed.: Llundain: Usborne Publishing, 1978.
Yn cynnwys mynegai = Includes index.
Addasiad Cymraeg gan = Welsh adaptation by: Twm Elias.
Coed by Esmond Harris. ISBN 1859025390. Published by Gwasg Gomer in 1998. Publication and catalogue information, links to buy online and reader comments.