APA
Clay David E, Shanahan John F, . (2011). GIS Applications in Agriculture Volume 2 Nutrient Management for Energy Efficiency. London: CRC Press.
Chicago
Clay David E, Shanahan John F, . 2011. GIS Applications in Agriculture Volume 2 Nutrient Management for Energy Efficiency. London: CRC Press.
Harvard
Clay David E, Shanahan John F, . (2011). GIS Applications in Agriculture Volume 2 Nutrient Management for Energy Efficiency. London: CRC Press.
MLA
Clay David E, Shanahan John F, . GIS Applications in Agriculture Volume 2 Nutrient Management for Energy Efficiency. London: CRC Press. 2011.