Argraffiad Saesneg gwreiddiol = Original English edition : Oxford : Rigby, 2000.
Addasiad Cymraeg: Awdurdod Cymwysterau, Cwricwlwm ac Asesu Cymru = Welsh adaptation: Qualifications, Curriculum and Assessment Authority for Wales.
Ffocws rhifedd 6 : taflenni cefnogi gweithgaredd 6 by Sheila Ebbutt. ISBN 0948469986. Published by Gwasg Taf in 2003. Publication and catalogue information, links to buy online and reader comments.