Arg. Saesneg gwreiddiol = Original English ed.: Harlow: Longman Group, 1994.
Addasiad Cymraeg gan = Welsh adaptation by: Sian Vaughan Evans Davies.
Ffrind newydd Letang by Beverley Naidoo. ISBN 1901358232. Published by Camfa in 1997. Publication and catalogue information, links to buy online and reader comments.