APA (7th ed.) Citation
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.
Chicago Style (17th ed.) Citation
Spain, James M., Edgar Amézquita Collazos, Idupulapati M. Rao, Miguel Angel Ayarza, Edmundo Barrios, and Marco Antonio Rondón. Improving Productivity and Sustainability of Crop-Livestock Systems in Tropical Savannas of South America. 2007.
MLA (9th ed.) Citation
Spain, James M., et al. Improving Productivity and Sustainability of Crop-Livestock Systems in Tropical Savannas of South America. 2007.
Warning: These citations may not always be 100% accurate.