Ralph Waldo Emerson, Robert Ernest Spiller, Alfred Riggs Ferguson, Joseph Slater, Jean Ferguson Carr (1971). “The Collected Works of Ralph Waldo Emerson: Nature, addresses, and lectures”, p.90, Harvard University Press
"L'Heptameron". Book by Marguerite de Navarre (Second Day, Novel XIX; 1558), as translated by Samuel Putnam in his book "Marguerite of Navarre" (p. 53), 1935.