Cita APA

Sys, I. C., Van Ranst, E., Debaveye, J., & Beernaert, F. (1993). Land evaluation: Crop requeriments. Brussels: Central Administration for Development Cooperation.

Citación estilo Chicago

Sys, I. C., E. Van Ranst, J. Debaveye, and F. Beernaert. Land Evaluation: Crop Requeriments. Brussels: Central Administration for Development Cooperation, 1993.

Cita MLA

Sys, I. C., E. Van Ranst, J. Debaveye, and F. Beernaert. Land Evaluation: Crop Requeriments. Brussels: Central Administration for Development Cooperation, 1993.