(en) John Charles Simon, Jennalee Donian, Understanding Laughter and Humor: Why We Laugh, Why We Don’t, and Why It Matters, Starbrook Pub Incorporated, , 284p. (ISBN9783031879517, lire en ligne)
(en) Kat Duff, The Alchemy of Illness, Pantheon Books, , 159p. (lire en ligne), p.85