Addasiad Cymraeg gan = Welsh adaptation by : Bethan Clement.
Argraffiad Saesneg gwreiddiol = Original English edition : New Zealand : Nelson Australia, 1996.
Y tylluanod bach by Beverley Randell. ISBN 1856447995. Published by Canolfan Astudiaethau Addysg in 2003. Publication and catalogue information, links to buy online and reader comments.