[[Fitxer:1896 Olympic marathon.jpg|thumbminiatura|Fotografia de Burton Holmes titulada ''"1896: Three athletes in training for the marathon at the Olympic Games in Athens"''.<ref name="m-getty">{{ref-web|url=http://www.gettyimages.com/detail/news-photo/three-athletes-in-training-for-the-marathon-at-the-olympic-news-photo/3066157|títol=1896, Marathon Runners, Burton Holmes|editor=Getty Images|consulta= 10 maig 2015|urlarxiu=https://web.archive.org/web/20120619073508/http://www.gettyimages.com/detail/news-photo/three-athletes-in-training-for-the-marathon-at-the-olympic-news-photo/3066157 |dataarxiu= 19 juny 2012 |deadurl=no}}</ref><ref name="m-burtonholmes-1901">{{ref-llibre|autor=Burton Holmes|títol=The Burton Holmes Lectures: The Olympian games in Athens. Grecian journeys. The wonders of Thessaly|url=https://books.google.com/books?id=Rt6fAAAAMAAJ&pg=PA69|any=1905|lloc=Nova York|editorial=McClure, Phillips & Co.|pàgines=69|isbn=9781276985949|consulta= 25 abril 2015}}(Digital compilation from original title: ''The Burton Holmes Lectures (Volume 3): With Illustrations from Photographs by the Author'', Year:1901, {{ISBN|9781151940469}}, on 6 November 2008, University of Michigan)</ref>]]
