APA (7th ed.) Citation

Giller, K. E., & Wilson, K. J. (1991). Nitrogen fixation in tropical cropping systems. CAB Internat.

Chicago Style (17th ed.) Citation

Giller, Ken E., and Kate J. Wilson. Nitrogen Fixation in Tropical Cropping Systems. Wallingford: CAB Internat, 1991.

MLA (9th ed.) Citation

Giller, Ken E., and Kate J. Wilson. Nitrogen Fixation in Tropical Cropping Systems. CAB Internat, 1991.