Argraffiad Saesneg gwreiddiol = Original English edition : London : Walker Books, 1993.
Addasiad Cymraeg gan = Welsh adaptation by : Meinir Wyn Edwards.
Hawys a'r bwrdd awyr by Ian Whybrow. ISBN 9781843235125. Published by Gwasg Gomer in 2005. Publication and catalogue information, links to buy online and reader comments.