Me pēnei te tohu i te whārangi:

Ashley Heenan. Related biographies for 'Barnett, John Maughan', Dictionary of New Zealand Biography, first published in 1996. Te Ara - the Encyclopedia of New Zealand, https://teara.govt.nz/mi/biographies/3b8/barnett-john-maughan/related-biographies (accessed 25 April 2024)