Argraffiad Saesneg gwreiddiol = Original English edition: Harlow : Longman, 1994.
Addasiad Cymraeg gan = Welsh adaptation by: Dylan Williams.
Y tŷ chwil by Errol Lloyd. ISBN 1860852424. Published by Uned Iaith Genedlaethol Cymru CBAC in 1997. Publication and catalogue information, links to buy online and reader comments.