Argraffiad Saesneg gwreiddiol = Original English edition : London : Walker Books, 2003.
Addasiad Cymraeg gan = Welsh adaptation by : Non Vaughan Williams.
Anrheg ben-blwydd Mari difaru dim by Berlie Doherty. ISBN 9781843235071. Published by Gomer in 2005. Publication and catalogue information, links to buy online and reader comments.