Arg. Saesneg gwreiddiol = Original English ed. : Llundain : Orchard Books, 1998.
Addasiad Cymraeg gan = Welsh adaptation by: Huw Ceiriog a Diana Jones.
Cyffro yn y cefnfor by Giles Andreae. ISBN 9781902416038. Published by Cymdeithas Lyfrau Ceredigion in 2008. Publication and catalogue information, links to buy online and reader comments.