Tystysgrif lefel mynediad mewn mathemateg /
Bright, Sue.
Birkett, Dan.
Pledger, Keith.
Qualifications, Curriculum & Assessment Authority for Wales
Aberystwyth : Canolfan Astudiaethau Addysg,
2003.
Argraffiad Saesneg gwreiddiol = Original English edition: Oxford : Heinemann Educational, 2001.
Addasiad Cymraeg gan = Welsh adaptation by : Ffion E. Kervegant.