Argraffiad Saesneg gwreiddiol = Original English edition: London : Piccadilly Press, 2000.
Addasiad Cymraeg gan = Welsh adaptation by: Hedd & Non ap Emlyn.
Tomi a'i ffrind newydd by Sally Chambers. ISBN 1855964848. Published by Gwasg y Dref Wen in 2001. Publication and catalogue information, links to buy online and reader comments.