Me pēnei te tohu i te whārangi:

F. Nigel Stace. Related biographies for 'O'Neill, Charles Gordon', Dictionary of New Zealand Biography, first published in 1993. Te Ara - the Encyclopedia of New Zealand, https://teara.govt.nz/mi/biographies/2o5/oneill-charles-gordon/related-biographies (accessed 25 April 2024)