Dyfyniad APA

Ayanaba, A., & Dart, P. J. (1977). BIological nitrogen fixation in farming systems of the tropics. John Wiley and Sons.

Dyfyniad Arddull Chicago

Ayanaba, A., and P J. Dart. BIological Nitrogen Fixation in Farming Systems of the Tropics. New York: John Wiley and Sons, 1977.

Dyfyniad MLA

Ayanaba, A., and P J. Dart. BIological Nitrogen Fixation in Farming Systems of the Tropics. John Wiley and Sons, 1977.

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