APA (7th ed.) Citation

Clay, M., & Lehrer, K. (1989). Knowledge and skepticism. Westview Press.

Chicago Style (17th ed.) Citation

Clay, Marjorie, and Keith Lehrer. Knowledge and Skepticism. Boulder, Colo: Westview Press, 1989.

MLA (9th ed.) Citation

Clay, Marjorie, and Keith Lehrer. Knowledge and Skepticism. Westview Press, 1989.