Argraffiad Saesneg gwreiddiol = Original English edition : London : Andersen Press, 2006.
Addasiad Cymraeg gan = Welsh adaptation by : Dylan Williams.
Watsh anweledig Wil by Brett McKee. ISBN 9781845120603. Published by Cymdeithas Lyfrau Ceredigion in 2007. Publication and catalogue information, links to buy online and reader comments.