Arg Saesneg gwreiddiol = Original English ed : Llundain: Dorling Kindersley, 1991.
Yn cynnwys mynegai = Includes index.
Dyfeisio by Lionel Bender. ISBN 0708311849. Published by Gwasg Prifysgol Cymru in 1993. Publication and catalogue information, links to buy online and reader comments.