APA (7th ed.) Zitazioa

Parvin, P. (2010). Karl Popper. Continuum.

Chicago Style (17th ed.) Zitazioa

Parvin, Philip. Karl Popper. New York: Continuum, 2010.

MLA (9th ed.) Zitazioa

Parvin, Philip. Karl Popper. Continuum, 2010.