Charles Croot. 'Alexander, William Frederick', Ngā Tāngata Taumata Rau, i tāngia tuatahitia ki 1996. Te Ara - the Encyclopedia of New Zealand, https://teara.govt.nz/mi/photograph/3485/william-frederick-alexander-arthur-nelson-field-and-joseph-angus-mackay (accessed 4 June 2026).
