Landers, J. (2007). Tropical crop-livestock systems in conservation agriculture. The Brazilian experience.
Chicago-referens (17:e uppl.)Landers, John. Tropical Crop-livestock Systems in Conservation Agriculture. The Brazilian Experience. 2007.
MLA-referens (9:e uppl.)Landers, John. Tropical Crop-livestock Systems in Conservation Agriculture. The Brazilian Experience. 2007.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.