Arg. Saesneg gwreiddiol = Original English ed.: Roper Press Inc., 1989.
Addasiad Cymraeg gan = Welsh adaptation by: Angharad Tomos.
Testun gwreiddiol gan = Original text by: Marilyn Lashbrook.
Da, gwell, gorau : stori Mair a Martha by Marilyn Lashbrook. ISBN 1859940862. Published by Cyhoeddiadau'r Gair in 1996. Publication and catalogue information, links to buy online and reader comments.