Me pēnei te tohu i te whārangi:
Carl Walrond, 'Ngā whakaahua, ngā rauemi katoa', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/tramping/media (accessed 1 December 2023)
He kōrero nā Carl Walrond, i tāngia i te 24 Sep 2007, updated 1 Jul 2015