APA (7th ed.) Zitazioa
Smil, V. (2008). Global catastrophes and trends: The next fifty years. MIT Press.
Chicago Style (17th ed.) Zitazioa
Smil, Vaclav. Global Catastrophes and Trends: The Next Fifty Years. Cambridge, MA: MIT Press, 2008.
MLA (9th ed.) Zitazioa
Smil, Vaclav. Global Catastrophes and Trends: The Next Fifty Years. MIT Press, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.