APA Edition Citation

Ayanaba A, D. P. J. Biological nitrogen fixation in farming systems of the tropics. John Wiley & Sons INC.

Chicago Edition Citation

Ayanaba A, Dart P J. Biological Nitrogen Fixation in Farming Systems of the Tropics. Chichester: John Wiley & Sons INC.

MLA Edition Citation

Ayanaba A, Dart P J. Biological Nitrogen Fixation in Farming Systems of the Tropics. John Wiley & Sons INC.

Warning: These citations may not always be 100% accurate.