Quine, Willard van Orman (1969), Epistemology Naturalized. In W.V.O. Quine (1969), Ontological Relativity and Other Essays. New York: Columbia University Press, 69-90. pdf available soon

Quine, Willard van Orman (1964/1953), Two Dogmas of Empiricism. In W.V.O. Quine (1964/1953), From a Logical Point of View. 2nd ed. Cambridge, MA: Harvard University Press, 20-46. pdf