Argraffiad Saesneg gwreiddiol = Original English edition: London : Doubleday, 2000.
Addasiad Cymraeg gan = Welsh adaptation by: Menna Davies.
Crispin : roedd popeth gan y mochyn hwn by Ted Dewan. ISBN 1902416341. Published by Cymdeithas Lyfrau Ceredigion in 2000. Publication and catalogue information, links to buy online and reader comments.