APA
Institute of Soil and Fertilizer, . (1980). The utilization of biogas fermentation residue-sludge and effluent. Beijing, China: United Nations Industrial Development Organization.
Chicago
Institute of Soil and Fertilizer, . 1980. The utilization of biogas fermentation residue-sludge and effluent. Beijing, China: United Nations Industrial Development Organization.
Harvard
Institute of Soil and Fertilizer, . (1980). The utilization of biogas fermentation residue-sludge and effluent. Beijing, China: United Nations Industrial Development Organization.
MLA
Institute of Soil and Fertilizer, . The utilization of biogas fermentation residue-sludge and effluent. Beijing, China: United Nations Industrial Development Organization. 1980.
