APA
                G. Kumari Roopa, R. Ananthanarayana Department of Soil Science and Agricultural Chemis, . (1999). Chemical and electro-chemical properties of acid soils of Karnataka. Bangalore: University of Agricultural Sciences Bangalore.
                
                Chicago
                G. Kumari Roopa, R. Ananthanarayana Department of Soil Science and Agricultural Chemis, . 1999. Chemical and electro-chemical properties of acid soils of Karnataka. Bangalore: University of Agricultural Sciences Bangalore.
                
                Harvard
                G. Kumari Roopa, R. Ananthanarayana Department of Soil Science and Agricultural Chemis, . (1999). Chemical and electro-chemical properties of acid soils of Karnataka. Bangalore: University of Agricultural Sciences Bangalore.
                
                MLA
                G. Kumari Roopa, R. Ananthanarayana Department of Soil Science and Agricultural Chemis, . Chemical and electro-chemical properties of acid soils of Karnataka. Bangalore: University of Agricultural Sciences Bangalore. 1999.