Argraffiad Saesneg gwreiddiol = Original English edition : London : Doubleday, 2003.
Addasiad Cymraeg gan Hedd a Non ap Emlyn = Welsh adaptation by Hedd and Non ap Emlyn.
Rwyt ti'n rhy fawr! by Simon Puttock. ISBN 1855966328. Published by Gwasg y Dref Wen in 2004. Publication and catalogue information, links to buy online and reader comments.