APA-viite

Singh, A. (1989). Nitrogen fixation in Indian rice fields. Agro Botanical Publishers.

Chicago-tyylinen lähdeviittaus

Singh, A.L. Nitrogen Fixation in Indian Rice Fields. Bikaner: Agro Botanical Publishers, 1989.

MLA-viite

Singh, A.L. Nitrogen Fixation in Indian Rice Fields. Agro Botanical Publishers, 1989.