Foster, Bernard John (1966). "ISLINGTON, Sir John Poynder Dickson-Poynder". In McLintock, A. H. (ed.). Te Ara - the Encyclopedia of New Zealand. Ministry for Culture and Heritage / Te Manatū Taonga. Archived from the original on 21 October 2012. Retrieved 30 March 2017.
Foster, Bernard John (1966). "ISLINGTON, Sir John Poynder Dickson-Poynder". In McLintock, A. H. (ed.). Te Ara - the Encyclopedia of New Zealand. Ministry for Culture and Heritage / Te Manatū Taonga. Archived from the original on 21 October 2012. Retrieved 30 March 2017.