Arg. Saesneg gwreiddiol = Original English ed.: Llundain: HarperCollins Publishers, 1998.
Addasiad Cymraeg gan = Welsh adaptation by: Roger Boore.
Cadno bach a'i ffrindiau yn rasio by Colin Hawkins. ISBN 1855963299. Published by Gwasg y Dref Wen in 1998. Publication and catalogue information, links to buy online and reader comments.