List of sources:
Campbell Collections: Button family papers, at http://campbell.ukzn.ac.za/?q=node/23090
Retrieved on 2016-1-27.
Dictionary of South African biography, Vol. 4, 1981.
Geni, at http://www.geni.com/people/Edward-Button/6000000030617973334 Retrieved 2016-1-27.
Geological Society of South Africa. Transactions, 1895-1899, Vol. 1-4: lists of office bearers and members.
Gunn, M. & Codd, L.E. Botanical exploration of southern Africa. Cape Town: Balkema, 1981.
Hall, A.L. A bibliography of South African geology to the end of 1920. Pretoria: Geological Survey, Memoir No. 18, 1922.
Harger, H.S. Historical notes on the Geological Society of South Africa. Proceedings of the Geological Society of South Africa, 1939, Vol. 42, pp. lxvii-lxxiv.
McCracken, D.P. & McCracken, P.A. Natal, the garden colony. Sandton: Fransden, 1990.
Natal almanac and yearly register for 1867-1869: Durban Horticultural Society; Natal Agricultural and Horticultural Society.
National Automated Archival Information Retrieval System (NAAIRS). http://www.national.archives.gov.za/naairs.htm Documents relating to Edward Button / E. Button.
Quickelberge, C. Collections and recollections. The Durban Natural History Museum, 1887-1987. Durban Natural History Museum, 1987.
Standard Encyclopaedia of southern Africa. Cape Town: Nasou, 1970.
Ward, J.H.W. & Wilson, M.G.C. Gold outside the Witwatersrand Basin. In M.G.C. Wilson & C.R. Annhaeusser (eds), The mineral resources of South Africa (6th ed., pp. 350-386). Pretoria: Council for Geoscience, 1998.