Addasiad Cymraeg gan = Welsh adaptation by : Myrddin ap Dafydd.
Argraffiad Saesneg gwreiddiol = Original English edition : London : Andersen Press, 2003.
Na! dwi ddim eisiau mynd i'r gwely! by Tony Ross. ISBN 086381896X. Published by Carreg Gwalch in 2004. Publication and catalogue information, links to buy online and reader comments.