Dyfyniad APA

Giller,Ken E, & wilson,kate j. (1991). Nitrogen fixation in tropical croping systems. CAB international.

Dyfyniad Arddull Chicago

Giller,Ken E, and wilson,kate j. Nitrogen Fixation in Tropical Croping Systems. United Kingdom: CAB international, 1991.

Dyfyniad MLA

Giller,Ken E, and wilson,kate j. Nitrogen Fixation in Tropical Croping Systems. CAB international, 1991.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.