Tisdale, S. L., Nelson, W. L., & Beaton, J. D. (1985). Soil fertility and fertilizers (4th ed.). Macmillan.
Cita Chicago (17th ed.)Tisdale, Samuel L., Werner L. Nelson, i James D. Beaton. Soil Fertility and Fertilizers. 4th ed. New York: Macmillan, 1985.
Cita MLA (9th ed.)Tisdale, Samuel L., et al. Soil Fertility and Fertilizers. 4th ed. Macmillan, 1985.
Atenció: Aquestes cites poden no estar 100% correctes.