Cita APA (7a ed.)

Sparks, D. L., Page, Helmke, P. A., Loeppert, R. H., Soltanpour, P. N., Tabatabai, M. A., . . . Sumner, M. E. (1996). Methods of soil analysis. American Society of Agronomy ; Soil Science Society of America.

Cita Chicago Style (17a ed.)

Sparks, D. L., Page, P. A. Helmke, R. H. Loeppert, P. N. Soltanpour, M. A. Tabatabai, C. T. Johnston, y Malcoln E. Sumner. Methods of Soil Analysis. Madison: American Society of Agronomy ; Soil Science Society of America, 1996.

Cita MLA (8a ed.)

Sparks, D. L., et al. Methods of Soil Analysis. American Society of Agronomy ; Soil Science Society of America, 1996.