1. On laughter;Allin;Psychological Review,1903
2. Social psychology;Allport,1924
3. Psychology: An introductory study of the structure and function of human consciousness;Angell,1904
4. Aristotle. The poetics. In S. H. Butcher (Ed. and Trans.), Aristotle's theory of poetry and fine art. New York: Macmillan, 1895.
5. Laughing;Armstrong,1928