Argraffiad Saesneg gwreiddiol = Original English edition: London : Orchard Books, 2000.
Addasiad Cymraeg gan = Welsh adaptation by: Dylan Williams.
Dyma nhw Popi a Macs by Lindsey Gardiner. ISBN 1902416384. Published by Cymdeithas Lyfrau Ceredigion in 2001. Publication and catalogue information, links to buy online and reader comments.