Estyn (2016) 'The Annual Report of Her Majesty’s Chief Inspector of Education and Training in Wales 2015–2016', Cardiff: Estyn, 20 to 21.
Estyn (2016) 'Adroddiad Blynyddol Prif Arolygydd Ei Mawrhydi dros Addysg a Hyfforddiant yng Nghymru 2015–2016' Caerdydd: Estyn, 20 i 21.