Watson,R.T. (2011). Global Biodiversity assessment. Cambridge University Press.
Chicago Style aipamenaWatson,R.T. Global Biodiversity Assessment. UK: Cambridge University Press, 2011.
MLA aipamenaWatson,R.T. Global Biodiversity Assessment. Cambridge University Press, 2011.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.