Me pēnei te tohu i te whārangi:

Esther Irving. Related biographies for 'Chapman, Sylvia Gytha de Lancey', Dictionary of New Zealand Biography, first published in 1998. Te Ara - the Encyclopedia of New Zealand, https://teara.govt.nz/mi/biographies/4c17/chapman-sylvia-gytha-de-lancey/related-biographies (accessed 7 May 2024)