Me pēnei te tohu i te whārangi:
Gerard Hutching and Carl Walrond, 'Ngā whakaahua, ngā rauemi katoa', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/marine-conservation/media (accessed 6 June 2023)
He kōrero nā Gerard Hutching and Carl Walrond, i tāngia i te 12 Jun 2006, updated 1 Sep 2015