Argraffiad Saesneg gwreiddiol = Original English edition: London : Scholastic Children's Books, 2001.
Addasiad Cymraeg gan = Welsh adaptation by: Gordon Jones.
Llyfr bordyn = Board book.
Nyrs Ceri by Nick Sharratt. ISBN 1843230089. Published by Gomer in 2001. Publication and catalogue information, links to buy online and reader comments.