Me pēnei te tohu i te whārangi:
Sue Zydenbos, 'Ngā whakaahua, ngā rauemi katoa', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/arable-farming/media (accessed 2 October 2023)
He kōrero nā Sue Zydenbos, i tāngia i te 24 Nov 2008