Argraffiad Saesneg gwreiddiol = Original English edition : London : Walker Books, 2002.
Addasiad Cymraeg gan = Welsh adaptation by : Dylan Williams.
Sâl wyt ti, Sam? by Amy Hest. ISBN 1902416724. Published by Cymdeithas Lyfrau Ceredigion Gyf in 2002. Publication and catalogue information, links to buy online and reader comments.