Me pēnei te tohu i te whārangi:

Peter B. Maling. Links and sources for 'Haast, Johann Franz Julius von', Dictionary of New Zealand Biography, first published in 1990, updated October, 2017. Te Ara - the Encyclopedia of New Zealand, https://teara.govt.nz/mi/biographies/1h1/haast-johann-franz-julius-von/sources (accessed 11 April 2021)