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.104, The Floating Press
Margaret Fuller, Arthur Buckminster Fuller (1874). “Woman in the 19th century, and kindred papers relating to the sphere, condition, and duties of woman”, p.7