Me pēnei te tohu i te whārangi:
Christine Dann, 'Ngā whakaahua, ngā rauemi katoa', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/sewage-water-and-waste/media (accessed 25 April 2024)
He kōrero nā Christine Dann, i tāngia i te 11 Mar 2010