Argraffiad Saesneg gwreiddiol = Original English edition: Oxford : Oxford University Press, 1989.
Addasiad Cymraeg gan = Welsh adaptation by: Juli Paschalis.
Teitl clawr = Cover title.
Y pwll dolffiniaid : stori am Wilff a Wilma by Roderick Hunt. ISBN 0861742435. Published by Gwasg Addysgol Drake in 1998. Publication and catalogue information, links to buy online and reader comments.