Mae'r gyfrol hon yn addasiad o'r 4ydd arg. Saesneg, 1995 = This volume is an adaptation of the 4th English ed., 1995.
Argraffiad Saesneg gwreiddiol = Original English edition: Walton-on-Thames: Thomas Nelson & Sons, 1978.
Yn cynnwys mynegai = Includes index.
Cemeg safon uwch. Cyfrol 3 by G. C. Hill. ISBN 1856444015. Published by Y Ganolfan Astudiaethau Addysg in 1999. Publication and catalogue information, links to buy online and reader comments.