Argraffiad Saesneg gwreiddiol = Original English edition : London : Little Tiger Press, 2002.
Addasiad Cymraeg gan = Welsh adaptation by : Elin Meek.
Gofal, Siôn Corn! by Julie Sykes. ISBN 1843232723. Published by Gwasg Gomer in 2003. Publication and catalogue information, links to buy online and reader comments.