Argraffiad Saesneg gwreiddiol = Original English edition: Cheltenham : Nelson Thornes, 1996.
Addasiad Cymraeg gan = Welsh adaptation by: Ffion E. Kervegant.
Allwedd mathemateg 8¹. ISBN 1856445720. Published by Canolfan Astudiaethau Addysg in 2001. Publication and catalogue information, links to buy online and reader comments.