Argraffiad Saesneg gwreiddiol = Original English edition : Oxford : Oxford University Press, 2000.
Addasiad Cymraeg gan = Welsh adaptation by : Mair Loader.
Stryd hapus : llyfr yr athrawon 1 by Lorena Roberts. ISBN 0861747593. Published by Gwasg Addysgol Drake in 2004. Publication and catalogue information, links to buy online and reader comments.