Argraffiad Saesneg gwreiddiol = Original English edition : London : Macmillan, 2004.
Addasiad Cymraeg gan = Welsh adaptation by : Sioned Lleinau.
Un tedi mas o'r gwely by Julia Donaldson. ISBN 9781843236276. Published by Gwasg Gomer in 2006. Publication and catalogue information, links to buy online and reader comments.