Argraffiad Saesneg gwreiddiol = Original English edition: London : Walker Books, 2001.
Addasiad Cymraeg gan = Welsh adaptation by: Emily Huws.
Llyfr sbecian drwy'r twll = Look through the hole book.
Beth wela i ar y fferm? by Caroline Anstey. ISBN 1859029566. Published by Gomer in 2001. Publication and catalogue information, links to buy online and reader comments.