Me pēnei te tohu i te whārangi:
Hugh Stringleman and Frank Scrimgeour, 'Ngā whakaahua, ngā rauemi katoa', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/dairying-and-dairy-products/media (accessed 9 June 2023)
He kōrero nā Hugh Stringleman and Frank Scrimgeour, i tāngia i te 24 Nov 2008