Ernst, W. G. (2000). Earth systems: Processes and issues. Cambridge University Press.
Chicago Style aipamenaErnst, W. G. Earth Systems: Processes and Issues. Cambridge: Cambridge University Press, 2000.
MLA aipamenaErnst, W. G. Earth Systems: Processes and Issues. Cambridge University Press, 2000.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.