1. Externalist Theories of Perception
2. Alston, William (1989b) "An Internalist Externalism," Alston. W., Epistemic Justification, Cornell University Press.
3. Alston, William (1989a), "Internalism and Externalism in Epistemology," Alston, W., Epistemic justification, Cornell University.
4. Alston, William (1993), The Reliability of Sense Perception, Cornell Univ. Press.
5. Alston، William (1991), Perceiving God: The Epistemology of Religious Experience, Ithaca. NY: Cornell University Press.