Citazione Stile APA (7a Edizione)

Giller, K. E. (1993). Nitrogen fixation in tropical cropping: Systems. C.A.B,I.

Citazione stile Chigago Style (17a edizione)

Giller, Ken E. Nitrogen Fixation in Tropical Cropping: Systems. Wallingford: C.A.B,I, 1993.

Citatione MLA (9a ed.)

Giller, Ken E. Nitrogen Fixation in Tropical Cropping: Systems. C.A.B,I, 1993.