
Arg. Saesneg gwreiddiol = Original English ed.: Basingstoke: Macmillan Education, 1986.
Yn cynnwys mynegai = Includes index.
Chwaraeon by Paul Beashel. ISBN 185644967X. Published by Canolfan Astudiaethau Addysg in 1997. Publication and catalogue information, links to buy online and reader comments.