APA استشهاد

Walker, B., & Steffen, W. (1996). Global change and terrestrial ecosystems. CUP.

استشهاد بنمط شيكاغو

Walker, Brian, و Will Steffen. Global Change and Terrestrial Ecosystems. Cambridge: CUP, 1996.

MLA استشهاد

Walker, Brian, و Will Steffen. Global Change and Terrestrial Ecosystems. CUP, 1996.