Argraffiad Saesneg gwreiddiol = Original English edition: Edinburgh : Barrington Stoke Ltd., 2000.
Addasiad Cymraeg gan = Welsh adaptation by: Emily Huws.
Mega Miliwn by Yvonne Coppard Quirk. ISBN 1843230410. Published by Gwasg Gomer in 2001. Publication and catalogue information, links to buy online and reader comments.