APA aipamena

Stewart, W. D. P. (1975). Nitrogen fixation by free- living micro organisms. Cambridge University Press.

Chicago Style aipamena

Stewart, W. D. P. Nitrogen Fixation by Free- Living Micro Organisms. London: Cambridge University Press, 1975.

MLA aipamena

Stewart, W. D. P. Nitrogen Fixation by Free- Living Micro Organisms. Cambridge University Press, 1975.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.