1. Butler, R. N. (1969). Age-Ism: Another form of bigotry. The Gerontologist, 9(4_Part_1), 243–246. https://doi.org/10.1093/geront/9.4_Part_1.243
2. Butler, R. N. (1975). Why survive? Being old in America. Harper & Row.
3. Butler, R. N. (2009). Combating ageism. International Psychogeriatrics, 21, 211–211. https://doi.org/10.1017/S104161020800731X
4. Columbia Aging Center. (n.d.). Legacy of Dr. Robert N. Butler. The Robert N. Butler Columbia Aging Center. https://aging.columbia.edu/about/robert-butler
5. Elder Law Answers. (2010, July 7). Robert Butler, Trailblazing advocate for the elderly, dies at 83. https://www.elderlawanswers.com/dr-robert-butler-trailblazing-advocate-for-the-elderly-dies-at-83-8444