Argraffiad Saesneg gwreiddiol = Original English edition : London : Usborne Publishing, 2001.
Addasiad Cymraeg gan = Welsh adaptation by : Emily Huws.
Geiriau cyntaf Fferm Cae Berllan by Heather Amery. ISBN 1859029574. Published by Gwasg Gomer in 2005. Publication and catalogue information, links to buy online and reader comments.