Argraffiad Saesneg gwreiddiol = Original English edition : Oxford : Rigby, 2001.
Addasiad Cymraeg gan Awdurdod Cymwysterau, Cwricwlwm ac Asesu Cymru = Welsh adaptation by Qualifications, Curriculum and Assessment Authority for Wales.
Ffocws rhifedd 1 : gemau a thaflenni cefnogi gweithgaredd. ISBN 1904837115. Published by Gwasg Taf in 2004. Publication and catalogue information, links to buy online and reader comments.