Me pēnei te tohu i te whārangi:
Ross Galbreath, 'Ngā whakaahua, ngā rauemi katoa', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/agricultural-and-horticultural-research/media (accessed 20 April 2024)
He kōrero nā Ross Galbreath, i tāngia i te 24 Nov 2008