Me pēnei te tohu i te whārangi:
Roger Blackley, 'Ngā whakaahua, ngā rauemi katoa', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/art-galleries-and-collections/media (accessed 6 June 2023)
He kōrero nā Roger Blackley, i tāngia i te 22 Oct 2014, updated 8 Aug 2016