Cita APA (7a ed.)
Spain, J. M., Amézquita Collazos, E., Rao, I. M., Ayarza, M. A., Barrios, E., & Rondón, M. A. (2007). Improving Productivity and Sustainability of Crop-Livestock Systems in Tropical Savannas of South America.
Cita Chicago Style (17a ed.)
Spain, James M., Edgar Amézquita Collazos, Idupulapati M. Rao, Miguel Angel Ayarza, Edmundo Barrios, y Marco Antonio Rondón. Improving Productivity and Sustainability of Crop-Livestock Systems in Tropical Savannas of South America. 2007.
Cita MLA (9a ed.)
Spain, James M., et al. Improving Productivity and Sustainability of Crop-Livestock Systems in Tropical Savannas of South America. 2007.
Precaución: Estas citas no son 100% exactas.