APA (7th ed.) Zitazioa
Friedel, R. D. (2007). A culture of improvement: Technology and the Western millennium. MIT Press.
Chicago Style (17th ed.) Zitazioa
Friedel, Robert D. A Culture of Improvement: Technology and the Western Millennium. Cambridge, MA: MIT Press, 2007.
MLA (9th ed.) Zitazioa
Friedel, Robert D. A Culture of Improvement: Technology and the Western Millennium. MIT Press, 2007.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.