Cita APA

Beets, W. (1990). Raising and sustaining productivity of smallholder farming systems in the tropics. A handbook of sustainable agricultural development. Alkmaar (Holanda): AgBé Publishing.

Citación estilo Chicago

Beets, W.C. Raising and Sustaining Productivity of Smallholder Farming Systems in the Tropics. A Handbook of Sustainable Agricultural Development. Alkmaar (Holanda): AgBé Publishing, 1990.

Cita MLA

Beets, W.C. Raising and Sustaining Productivity of Smallholder Farming Systems in the Tropics. A Handbook of Sustainable Agricultural Development. Alkmaar (Holanda): AgBé Publishing, 1990.