Me pēnei te tohu i te whārangi:
Mark Derby, 'Ngā whakaahua, ngā rauemi katoa', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/knowledge-based-industries/media (accessed 6 December 2023)
He kōrero nā Mark Derby, i tāngia i te 11 Mar 2010, reviewed & revised 5 Dec 2017