Ar y clawr = On cover : Taith i'r byd dirgel o dan ein traed.
Addasiad Cymraeg gan = Welsh adaptation by : Elin Meek.
Argraffiad Saesneg gwreiddiol = Original English edition : London : Franklin Watts, 1996.
Beth sydd o dan y gwely? by Mick Manning. ISBN 1843231921. Published by Gwasg Gomer in 2003. Publication and catalogue information, links to buy online and reader comments.