Me pēnei te tohu i te whārangi:

John Barton. Links and sources for 'James, Esther Marion Pretoria', Dictionary of New Zealand Biography, first published in 1998. Te Ara - the Encyclopedia of New Zealand, https://teara.govt.nz/mi/biographies/4j2/james-esther-marion-pretoria/sources (accessed 23 April 2024)