Arg. Saesneg gwreiddiol = Original English ed.: Cambridge : Cambridge University Press, 1992.
Yn cynnwys mynegai = Includes index.
Addasiad Cymraeg: Uned Iaith Genedlaethol Cymru, CBAC = Welsh adaptation: National Language Unit of Wales, WJEC.
Darnau gwyrdd. ISBN 1860850855. Published by Uned Iaith Genedlaethol Cymru CBAC in 1996. Publication and catalogue information, links to buy online and reader comments.