Seth Grahame-Smith, Jane Austen, Roberto Parada (2009). “Pride and Prejudice and Zombies: The Classic Regency Romance--now with Ultraviolent Zombie Mayhem”, p.163, Chronicle Books
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.58, Harvard University Press