Wikipedia, engl.
https://en.wikipedia.org/wiki/William_Hickey_%28writer%29
A Compendium of Irish Biography. 1878, S. 585
https://archive.org/stream/acompendiumiris00webbgoog#page/n590
http://www.libraryireland.com/biography/ReverendWilliamHickey.php
Dictionary of National Biography 26 (1891), S. 356-357
https://archive.org/stream/dictionarynatio46stepgoog#page/n368
https://en.wikisource.org/wiki/Hickey,_William_%28DNB00%29
Desmond, Ray: Dictionary of british and irish botantists and horticulturalists. London 1994, S. 340
https://books.google.com/books?id=thmPzIltAV8C&pg=340