Arg. Saesneg gwreiddiol = Original English ed.: London: Piccadilly Press, 1999.
Addasiad Cymraeg gan = Welsh adaptation by: Hedd a Non ap Emlyn.
Barti a thrychineb y sos coch by Sally Chambers. ISBN 1855963418. Published by Gwasg y Dref Wen in 1999. Publication and catalogue information, links to buy online and reader comments.