Me pēnei te tohu i te whārangi:
Michael J. Crozier, 'Ngā whakaahua, ngā rauemi katoa', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/landslides/media (accessed 14 May 2024)
He kōrero nā Michael J. Crozier, i tāngia i te 12 Jun 2006