Citazione APA

John L Havlin. (2014). Soil fertility and fertilizers: An introduction to nutrient management (8.). PHI learning pvt. ltd.

Stile di citazione Chicago

John L Havlin. Soil Fertility and Fertilizers: An Introduction to Nutrient Management. 8. New Delhi: PHI learning pvt. ltd, 2014.

Citazione MLA

John L Havlin. Soil Fertility and Fertilizers: An Introduction to Nutrient Management. 8. PHI learning pvt. ltd, 2014.