Arg. Saesneg gwreiddiol = Original English ed.: London: Franklin Watts, 1997.
Addasiad Cymraeg gan = Welsh adaptation by: Emily Huws.
Ffroeni ac arogleuo by Henry Pluckrose. ISBN 0861740947. Published by Gwasg Addysgol Drake in 1997. Publication and catalogue information, links to buy online and reader comments.