Arg. Saesneg gwreiddiol = Original English ed.: London: Scholastic Ltd, 1996.
Addasiad Cymraeg gan = Welsh adaptation by: Hedd a Non ap Emlyn.
Postman pat a'r bêl las by John A. Cunliffe. ISBN 1855962969. Published by Dref Wen in 1997. Publication and catalogue information, links to buy online and reader comments.