APA
Havlin J., . (2013). Soil fertility and fertilizers. Upper Saddle River, N.J: Pearson.
Chicago
Havlin John, . 2013. Soil fertility and fertilizers. Upper Saddle River, N.J: Pearson.
Harvard
Havlin J., . (2013). Soil fertility and fertilizers. Upper Saddle River, N.J: Pearson.
MLA
Havlin John, . Soil fertility and fertilizers. Upper Saddle River, N.J: Pearson. 2013.