APA
Roy R. N., . (2003). Assessment of soil nutrient balance: Approaches and methodologies. Rome: Food and Agriculture Organization of the United Nations.
Chicago
Roy R N, . 2003. Assessment of soil nutrient balance: Approaches and methodologies. Rome: Food and Agriculture Organization of the United Nations.
Harvard
Roy R. N., . (2003). Assessment of soil nutrient balance: Approaches and methodologies. Rome: Food and Agriculture Organization of the United Nations.
MLA
Roy R N, . Assessment of soil nutrient balance: Approaches and methodologies. Rome: Food and Agriculture Organization of the United Nations. 2003.