Cita APA (7a ed.)

Bock, B. R., & Kelley, K. R. (1992). Predicting N fertilizer needs for corn in humid regions. National Fertilizer and Environmental Research Center ; Tennessee Valley Authority.

Cita Chicago Style (17a ed.)

Bock, B. R., y K. R. Kelley. Predicting N Fertilizer Needs for Corn in Humid Regions. Alabama: National Fertilizer and Environmental Research Center ; Tennessee Valley Authority, 1992.

Cita MLA (8a ed.)

Bock, B. R., y K. R. Kelley. Predicting N Fertilizer Needs for Corn in Humid Regions. National Fertilizer and Environmental Research Center ; Tennessee Valley Authority, 1992.