Arg. Saesneg gwreiddiol = Original English ed.: Llundain: Piccadilly Press, 1997.
Addasiad Cymraeg gan = Welsh adaptation by: Hedd a Non ap Emlyn.
Ryan a'i esgidiau glaw gwych by Lisa Stubbs. ISBN 1855962993. Published by Gwasg y Dref Wen in 1997. Publication and catalogue information, links to buy online and reader comments.