Arg Saesneg gwreiddiol = Original English ed: London: Longman, 1988.
Yn cynnwys mynegai = Includes index.
Dylunwyr a dylunio by Ian Burden. ISBN 0905345576. Published by Adran Gymraeg, Cyd-bwyllgor Addysg Cymru in 1992. Publication and catalogue information, links to buy online and reader comments.