Ralph Cudworth (1845). “The True Intellectual System of the Universe: Wherein All the Reason and Philosophy of Atheism is Confuted, and Its Impossibility Demonstrated : with a Treatise Concerning Eternal and Immutable Morality”, p.539
William Dean Howells (2015). “William Dean Howells - Premium Collection: 27 Novels in One Volume (Illustrated): The Rise of Silas Lapham, A Traveler from Altruria, Through the Eye of the Needle, An Open-Eyed Conspiracy, Indian Summer, The Flight of Pony Baker, A Hazard of New Fortunes, Ragged Lady & many more”, p.5299, e-artnow
Albert Einstein (2015). “Bite-Size Einstein: Quotations on Just About Everything from the Greatest Mind of the Twentieth Century”, p.15, St. Martin's Press
Henry Beston, Elizabeth Jane Coatsworth (2001). “The Best of Beston: A Selection from the Natural World of Henry Beston from Cape Cod to the St. Lawrence”, p.18, David R. Godine Publisher
Henry Beston, Elizabeth Jane Coatsworth (2001). “The Best of Beston: A Selection from the Natural World of Henry Beston from Cape Cod to the St. Lawrence”, p.18, David R. Godine Publisher