Me pēnei te tohu i te whārangi:

Bronwyn Dalley. Related biographies for 'Beck, John', Dictionary of New Zealand Biography, first published in 1998, updated o Ākuhata, 2015. Te Ara - the Encyclopedia of New Zealand, https://teara.govt.nz/mi/biographies/4b17/beck-john/related-biographies (accessed 6 May 2024)