Cita APA

Sys, C., Van Ranst, E., & Debaveye, J. (1991). Land evaluation: Principles in land evaluation and crop production calculations. Brussels: Central Administration for Development Cooperation.

Citación estilo Chicago

Sys, C., E. Van Ranst, and J. Debaveye. Land Evaluation: Principles in Land Evaluation and Crop Production Calculations. Brussels: Central Administration for Development Cooperation, 1991.

Cita MLA

Sys, C., E. Van Ranst, and J. Debaveye. Land Evaluation: Principles in Land Evaluation and Crop Production Calculations. Brussels: Central Administration for Development Cooperation, 1991.