"Our history". Plunket Society. Retrieved 12 November 2010.
teara.govt.nz
A. H. McLintock, ed. (1966). "PLUNKET, Sir William Lee Plunket, Fifth Baron, GCVO, GCMG, KBE, KGStJ, BA". An Encyclopaedia of New Zealand. Ministry for Culture and Heritage/Te Manatū Taonga. Retrieved 11 November 2010.