Argraffiad Saesneg gwreiddiol = Original English edition : London : Simon and Schuster Young Books, 1990.
Addasiad Cymraeg gan = Welsh adaptation by : Gordon Jones.
Edrych, Rhys bach! by Martin Waddell. ISBN 1843233142. Published by Gwasg Gomer in 2004. Publication and catalogue information, links to buy online and reader comments.