Argraffiad Saesneg gwreiddiol = Original English edition : London : Usborne Publishing, 1990.
Addasiad Cymraeg gan = Welsh adaptation by : Sioned Lleinau.
Cyfrinach y bwgan brain by Heather Amery. ISBN 1843233363. Published by Gwasg Gomer in 2004. Publication and catalogue information, links to buy online and reader comments.