Arg. Saesneg gwreiddiol = Original English ed.: London: Scholastic Children's Books, 1997.
Addasiad Cymraeg gan = Welsh adaptation by: Luned Whelan.
Teitl clawr = Cover title.
Pwy sydd yn yr ardd? by Sue Cony. ISBN 0852842198. Published by Hughes a'i Fab. Publication and catalogue information, links to buy online and reader comments.