Me pēnei te tohu i te whārangi:
Willem de Lange, 'Ngā whakaahua, ngā rauemi katoa', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/coastal-erosion/media (accessed 3 October 2023)
He kōrero nā Willem de Lange, i tāngia i te 12 Jun 2006