Walker, B., & Steffen, W. (1996). Global change and terrestrial ecosystems. CUP.
Chicago Style aipamenaWalker, Brian, and Will Steffen. Global Change and Terrestrial Ecosystems. Cambridge: CUP, 1996.
MLA aipamenaWalker, Brian, and Will Steffen. Global Change and Terrestrial Ecosystems. CUP, 1996.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.