Arg. Saesneg gwreiddiol = Original English ed.: Harlow: Longman Group, 1994.
Addasiad Cymraeg gan = Welsh adaptation by: Martin Davis.
Teitl clawr = Cover title.
Teganau swnllyd by Ann Langram. ISBN 1860851630. Published by CBAC in 1997. Publication and catalogue information, links to buy online and reader comments.