Arg. Saesneg gwreiddiol = Original English ed.: Cambridge: Cambridge University Press, 1997.
Addasiad Cymraeg gan = Welsh adaptation by: Trosol Cyf.
Mathemateg newydd Caergrawnt. Modwl 3. Llyfr 2. ISBN 1860852726. Published by Uned Iaith Genedlaethol Cymru in 1998. Publication and catalogue information, links to buy online and reader comments.