Ffocws rhifedd 4 : fy nyddiadur mathemateg /
Askew, Mike.
Ebbutt, Sheila.
Qualifications, Curriculum &  Assessment Authority for Wales.
Caergybi : Gwasg Taf,
2001.
Addasiad Cymraeg gan Awdurdod Cymwysterau, Cwricwlwm ac Asesu Cymru = Welsh adaptation by Qualifications, Curriculum and Assessment Authority for Wales.
Argraffiad Saesneg gwreiddiol = Original English edition : Oxford : Rigby, 1999.
Teitl clawr = Cover title.
Numeracy