Me pēnei te tohu i te whārangi:

Gerard Hutching, 'Ngā whakaahua, ngā rauemi katoa', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/shags/media (accessed 6 June 2020)

He kōrero nā Gerard Hutching, i tāngia i te 12 Jun 2006, reviewed & revised 11 Jul 2016