Cita APA (7th ed.)
Giller, K. E. (2001). Nitrogen fixation in tropical cropping systems (2nd ed.). CABI Pub..
Cita Chicago (17th ed.)
Giller, K. E. Nitrogen Fixation in Tropical Cropping Systems. 2nd ed. Wallingford, Oxon, UK ; New York, NY, USA: CABI Pub., 2001.
Cita MLA (9th ed.)
Giller, K. E. Nitrogen Fixation in Tropical Cropping Systems. 2nd ed. CABI Pub., 2001.
Atenció: Aquestes cites poden no estar 100% correctes.