Dyfyniad APA

(1993). Biological Fixation Of Nitrogen For Ecology And Sustainable Agriculture. Springer-Verlag Berlin.

Dyfyniad Arddull Chicago

Biological Fixation Of Nitrogen For Ecology And Sustainable Agriculture. Springer-Verlag Berlin, 1993.

Dyfyniad MLA

Biological Fixation Of Nitrogen For Ecology And Sustainable Agriculture. Springer-Verlag Berlin, 1993.

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