Me pēnei te tohu i te whārangi:
Philip Colquhoun, 'Ngā whakaahua, ngā rauemi katoa', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/accountancy/media (accessed 24 April 2024)
He kōrero nā Philip Colquhoun, i tāngia i te 11 Mar 2010