Arg. Saesneg gwreiddiol = Original English ed.: Llundain: Walker Books, 1991.
Addasiad Cymraeg gan = Welsh adaptation by: Hywel Nicholas a Siân Jones.
Yr arth a'r noson frawychus by Sarah Hayes. ISBN 0952153610. Published by Gwasg Pobl Cymru in 1998. Publication and catalogue information, links to buy online and reader comments.