Arg. Saesneg gwreiddiol = Original English ed.: London: Doubleday, 1996.
Addasiad Cymraeg gan = Welsh adaptation by: Dylan Williams.
Y plentyn nad oedd am gysgu by Helen Cooper. ISBN 094893039X. Published by Cymdeithas Lyfrau Ceredigion in 1997. Publication and catalogue information, links to buy online and reader comments.