APA (7th ed.) Citation

Giller, K. E., & Wilson, K. J. (1991). Nitrogen fixation in tropical cropping systems. C.A.B. International.

Chicago Style (17th ed.) Citation

Giller, K. E., and Kate J. Wilson. Nitrogen Fixation in Tropical Cropping Systems. UK: C.A.B. International, 1991.

MLA (9th ed.) Citation

Giller, K. E., and Kate J. Wilson. Nitrogen Fixation in Tropical Cropping Systems. C.A.B. International, 1991.