APA

Abrol Y., Raghuram N. & Sachdev M. (2007). Agriculture nitrogen use & its environmental implications. New Delhi: I.K. International Publishing.

Chicago

Abrol Y.P, Raghuram N and Sachdev M.S. 2007. Agriculture nitrogen use & its environmental implications. New Delhi: I.K. International Publishing.

Harvard

Abrol Y., Raghuram N. and Sachdev M. (2007). Agriculture nitrogen use & its environmental implications. New Delhi: I.K. International Publishing.

MLA

Abrol Y.P, Raghuram N and Sachdev M.S. Agriculture nitrogen use & its environmental implications. New Delhi: I.K. International Publishing. 2007.