Kilmer, J. V., Younts, S. E., & Brady, N. C. (1968). The role of potassium in agriculture (Primera edición.). American society of agronomy.
Citazione stile Chigago Style (17a edizione)Kilmer, J. V., S. E. Younts, e Nyle C. Brady. The Role of Potassium in Agriculture. Primera edición. Madison: American society of agronomy, 1968.
Citatione MLA (8a ed.)Kilmer, J. V., et al. The Role of Potassium in Agriculture. Primera edición. American society of agronomy, 1968.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.