Yn cynnwys mynegai = Includes index.
Argraffiad Saesneg gwreiddiol = Original English edition : Kirkby -in-Furness : Coordination Group Publications, 1997.
Cemeg : y llyfr adolygu. ISBN 1856445429. Published by Y Ganolfan Astudiaethau Addysg in 2000. Publication and catalogue information, links to buy online and reader comments.