Me pēnei te tohu i te whārangi:
James Watson, 'Ngā whakaahua, ngā rauemi katoa', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/transport-overview/media (accessed 31 March 2023)
He kōrero nā James Watson, i tāngia i te 11 Mar 2010