Cita APA (7a ed.)

Klein, P. D. (1981). Certainty: A refutation of sceptisim. University of Minnesota Press.

Cita Chicago Style (17a ed.)

Klein, Peter D. Certainty: A Refutation of Sceptisim. University of Minnesota Press, 1981.

Cita MLA (9a ed.)

Klein, Peter D. Certainty: A Refutation of Sceptisim. University of Minnesota Press, 1981.