Klein, P. D. (1981). Certainty: A refutation of sceptisim. University of Minnesota Press.
Chicago Style aipamenaKlein, Peter D. Certainty: A Refutation of Sceptisim. University of Minnesota Press, 1981.
MLA aipamenaKlein, Peter D. Certainty: A Refutation of Sceptisim. University of Minnesota Press, 1981.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.