Arg. Saesneg gwreiddiol = Original English ed.: London: Franklin Watts, 1997.
Addasiad Cymraeg gan = Welsh adaptation by: Emily Huws.
Teimlo'n - swil by Sally Hewitt. ISBN 086174098X. Published by Gwasg Addysgol Drake in 1997. Publication and catalogue information, links to buy online and reader comments.