APA
Pratap Narain, N P Datta Department of Soil Science and Agricultural Chemis, . (1969). Nitrification inhibitors and efficiency of nitrogen fertilizer use for paddy and wheat. Delhi: New Delhi.
Chicago
Pratap Narain, N P Datta Department of Soil Science and Agricultural Chemis, . 1969. Nitrification inhibitors and efficiency of nitrogen fertilizer use for paddy and wheat. Delhi: New Delhi.
Harvard
Pratap Narain, N P Datta Department of Soil Science and Agricultural Chemis, . (1969). Nitrification inhibitors and efficiency of nitrogen fertilizer use for paddy and wheat. Delhi: New Delhi.
MLA
Pratap Narain, N P Datta Department of Soil Science and Agricultural Chemis, . Nitrification inhibitors and efficiency of nitrogen fertilizer use for paddy and wheat. Delhi: New Delhi. 1969.