Chagall, Marc, 1887-1985. Abraham and the Visitors at Mamre, from Art in the Christian Tradition, a project of the Vanderbilt Divinity Library, Nashville, TN. http://diglib.library.vanderbilt.edu/act-imagelink.pl?RC=54658 [retrieved May 17, 2016]. Original source: http://www.flickr.com/photos/leahbrooks/3966832626/.