"Tongerlo Abbey Houses A Remarkable Treasure". Public Diplomacy Service of the Federal Public Service Foreign Affairs, Foreign Trade and Development Cooperation. 10 May 2019. Retrieved 20 March 2020.
frostartmuseum.org
drawingproject.frostartmuseum.org
"Mary Beth Edelson". The Frost Art Museum Drawing Project. Retrieved 11 January 2014.
"Mary Beth Adelson". Clara – Database of Women Artists. Washington, D.C.: National Museum of Women in the Arts. Archived from the original on 10 January 2014. Retrieved 10 January 2014.
open.edu
"DaVinci". The Mark Steel Lectures. Series 2. Episode 2. The Open University. 7 October 2003. BBC. Archived from the original on 17 September 2018. Retrieved 21 December 2012.
"DaVinci". The Mark Steel Lectures. Series 2. Episode 2. The Open University. 7 October 2003. BBC. Archived from the original on 17 September 2018. Retrieved 21 December 2012.
"Leonardo's Last Supper". Smart history presented by the Khan Academy. Archived from the original on 15 February 2014. Retrieved 25 February 2014.
"Mary Beth Adelson". Clara – Database of Women Artists. Washington, D.C.: National Museum of Women in the Arts. Archived from the original on 10 January 2014. Retrieved 10 January 2014.