Arg. Saesneg gwreiddiol = Original English ed.: Harlow: Longman Group, 1994.
Addasiad Cymraeg gan = Welsh adaptation by: Martin Davis.
Teitl clawr = Cover title.
Gwneud pypedau by James Dunbar. ISBN 1860851584. Published by CBAC in 1997. Publication and catalogue information, links to buy online and reader comments.