"37-year-old Olympian explains how she stays so dominant at an age when most athletes retire". Interview with Emmett Knowlton, www.businessinsider.com. March 1, 2016.
Anna Howard Shaw (2017). “THE STORY OF A PIONEER: The Insightful Life Story of the leading Suffragist, Physician and the First Female Methodist Minister of USA”, p.94, e-artnow