1. Hoopes, James. 1991. Peirce on Signs. Ed. James Hoopes. Chapel Hill: The University of North Carolina Press.
2. Peirce, Charles Sanders. 1932. Collected Papers of Charles Sanders Peirce. Eds. Charles Hartshorne and Paul Weiss. Cambridge, MA: Harvard University Press.
3. Percy, Walker. 1975. Message in the Bottle: How Queer Man Is, How Queer Language Is, and What One Has to Do with the Other. New York: Farrar, Straus, & Giroux.