Addasiad Cymraeg gan = Welsh adaptation by : Siân Lewis.
Addasiad Saesneg gwreiddiol = Original English edition : London : HarperCollins, 1998.
Y clwb cysgu cŵl a'r llong ofod by Sue Mongredien. ISBN 1843232987. Published by Gwasg Gomer in 2003. Publication and catalogue information, links to buy online and reader comments.