Linus Pauling, Barbara Marinacci (1995). “Linus Pauling in His Own Words: Selections From His Writings, Speeches and Interviews”, p.204, Simon and Schuster
Mark Kac, Gian-Carlo Rota, Jacob T. Schwartz (2009). “Discrete Thoughts: Essays on Mathematics, Science and Philosophy”, p.263, Springer Science & Business Media
Rebecca Latimer Felton (1919). “Country Life in Georgia in the Days of My Youth: Also Addresses Before Georgia Legislature Woman's Clubs, Women's Organizations and Other Noted Occasions”
John Gabriel Stedman (1813). “Narrative, of a Five Years' Expedition, Against the Revolted Negroes of Surinam, in Guiana, on the Wild Coast of South America; from the Year 1772, to 1777:: Elucidating the History of that Country, and Describing Its Productions, ... with an Account of the Indians of Guiana, & Negroes of Guinea”, p.396