Fy Nodiadau Adolygu: CBAC TGAU Ffiseg (My Revision Notes: WJEC GCSE Physics, Welsh-language Edition) Pollard Jeremy Heftet / 2018 / Walisisk
Fy Nodiadau Adolygu: CBAC TGAU Cemeg (My Revision Notes: WJEC GCSE Chemistry, Welsh-language Edition) Schmit Adrian Heftet / 2018 / Walisisk
My Revision Notes: AQA Applied Science Suitable for Level 3 and Level 3 Extended Certificates Pollard Jeremy Heftet / 2021 / Engelsk
Fy Nodiadau Adolygu: CBAC TGAU Gwyddoniaeth Dwyradd (My Revision Notes: WJEC GCSE Science Double Award, Welsh-language Edition) Schmit Adrian Heftet / 2018 / Walisisk
TGAU Gwyddoniaeth Gymhwysol CBAC: Gradd Unigol a Dwyradd Single and Double Award Pollard Jeremy Heftet / 2023 / Walisisk
