Mastering Mathematics for WJEC GCSE Practice Book: Intermediate Pledger Keith Heftet / 2016 / Engelsk
Meistroli Mathemateg CBAC TGAU Llyr Ymarfer: Uwch (Mastering Mathematics for WJEC GCSE Practice Book: Higher Welsh-language edition) Pledger Keith Heftet / 2017 / Walisisk
WJEC GCSE Maths Foundation: Mastering Mathematics Revision Guide Pledger Keith Heftet / 2017 / Engelsk
Meistroli Mathemateg CBAC TGAU Llyr Ymarfer: Canolradd (Mastering Mathematics for WJEC GCSE Practice Book: Intermediate Welsh-language edition) Pledger Keith Heftet / 2017 / Engelsk
Meistroli Mathemateg CBAC TGAU Llyr Ymarfer: Sylfaenol (Mastering Mathematics for WJEC GCSE Practice Book: Foundation Welsh-language edition) Pledger Keith Heftet / 2017 / Walisisk
