Argraffiad Saesneg gwreiddiol = Original English edition : Cheltenham : Nelson Thornes, 1998.
Addasiad Cymraeg gan Howard Williams a Berwyn Prys Jones = Welsh adaptation by Howard Williams and Berwyn Prys Jones.
Yn cynnwys mynegai = Includes index.
Y byd eang by David Waugh. ISBN 1843235765. Published by Gomer in 2005. Publication and catalogue information, links to buy online and reader comments.