APA (7th ed.) Zitazioa
Radder, H. (2006). The world observed, the world conceived. University of Pittsburgh Press.
Chicago Style (17th ed.) Zitazioa
Radder, Hans. The World Observed, the World Conceived. Pittsburgh, Pennsylvania: University of Pittsburgh Press, 2006.
MLA (9th ed.) Zitazioa
Radder, Hans. The World Observed, the World Conceived. University of Pittsburgh Press, 2006.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.