Argraffiad Saesneg gwreiddiol = Original English edition : London : Walker Books, 2005.
Addasiad Cymraeg gan = Welsh adaptation by : Casi Dylan a Dylan Williams.
Y plant a'r drwg yn y caws by Allan Ahlberg. ISBN 1845120310. Published by Cymdeithas Lyfrau Ceredigion in 2005. Publication and catalogue information, links to buy online and reader comments.