Argraffiad Saesneg gwreiddiol = Original English edition : London : HarperCollins, 1998.
Addasiad Cymraeg gan = Welsh adaptation by : Siân Lewis.
Y Clwb Cysgu Cŵl yn Sbaen by Narinder Dhami. ISBN 1843231360. Published by Gwasg Gomer in 2002. Publication and catalogue information, links to buy online and reader comments.