Kettering International Symposium on Nitrogen Fixation Madison, Wis., & Orme-Johnson, W. H. (1980). Nitrogen fixation. University Park Press.
Čikaški stil citiranja (17. izdanje)Kettering International Symposium on Nitrogen Fixation Madison, Wis., i William H. Orme-Johnson. Nitrogen Fixation. Baltimore: University Park Press, 1980.
MLA način citiranja (9. izdanje)Kettering International Symposium on Nitrogen Fixation Madison, Wis., i William H. Orme-Johnson. Nitrogen Fixation. University Park Press, 1980.
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