Elbert Hubbard (1908). “Little Journeys to the Homes of Great Teachers ...: no. 1. Booker T. Washington. no. 2. Thomas Arnold. no. 3. Erasmus. no. 4. Hypatia. no. 5. St. Benedict. no. 6. Mary Baker Eddy”
Elbert Hubbard (2009). “Love, Life & Work: Being a Book of Opinions Reasonably Good-Natured Concerning How to Attain the Highest Happiness for One's Self with the Least Possible Harm to Others”, p.14, The Floating Press