APA
P P Joy, G V Havanagi Agronomy, . (1984). Effect of different levels of nitrogen, phosphorus and azolla (Azolla Pinnata R. Br.) ON Azolla-Rice (Oryza sativa L.) Productiv. Bangalore: University of Agricultural Sciences, Bangalore.
Chicago
P P Joy, G V Havanagi Agronomy, . 1984. Effect of different levels of nitrogen, phosphorus and azolla (Azolla Pinnata R. Br.) ON Azolla-Rice (Oryza sativa L.) Productiv. Bangalore: University of Agricultural Sciences, Bangalore.
Harvard
P P Joy, G V Havanagi Agronomy, . (1984). Effect of different levels of nitrogen, phosphorus and azolla (Azolla Pinnata R. Br.) ON Azolla-Rice (Oryza sativa L.) Productiv. Bangalore: University of Agricultural Sciences, Bangalore.
MLA
P P Joy, G V Havanagi Agronomy, . Effect of different levels of nitrogen, phosphorus and azolla (Azolla Pinnata R. Br.) ON Azolla-Rice (Oryza sativa L.) Productiv. Bangalore: University of Agricultural Sciences, Bangalore. 1984.