Arg. Saesneg gwreiddiol = Original English ed.: Llundain: Scholastic, 1996.
Addasiad Cymraeg gan = Welsh adaptation by: Luned Whelan.
Ble mae fy sebra melyn? by Angela Brooksbank. ISBN 0852842341. Published by Hughes a'i Fab in 1998. Publication and catalogue information, links to buy online and reader comments.