Mortvedt, J. J., Cox, F. R., Shuman, L. M., Welch, R. M., Mickelson, S. H., & Luxmoore, R. J. (2015). Micronutrients in agriculture (Second Edition.). Wisconsin, Estado Unidos: Soil Science Society of America, Inc..

Mortvedt, J. J.,, F. R. Cox, L. M. Shuman, R. M. Welch, S. H. Mickelson, and R. J. Luxmoore. Micronutrients in Agriculture. Second Edition. Wisconsin, Estado Unidos: Soil Science Society of America, Inc., 2015.

Mortvedt, J. J.,, et al. Micronutrients in Agriculture. Second Edition. Wisconsin, Estado Unidos: Soil Science Society of America, Inc., 2015.