Argraffiad Saesneg gwreiddiol = Original English edition: London : Doubleday, 2004.
Argraffiad Cymraeg gwreiddiol = Original Welsh edition : 2005.
Addasiad Cymraeg gan = Welsh adaptation by: Elin Meek.
Ffrindiau gorau by Jacqueline Wilson. ISBN 9781843235774. Published by Gomer in 2006. Publication and catalogue information, links to buy online and reader comments.