Cita APA (7a ed.)
Leisinger, K. M., Schmitt, K. M., & Pandya-Lorch, R. (2002). Six billion and counting: Population and food security in the 21st century. International Food Policy Research Institute.
Cita Chicago Style (17a ed.)
Leisinger, Klaus M., Karin M. Schmitt, y Rajul Pandya-Lorch. Six Billion and Counting: Population and Food Security in the 21st Century. International Food Policy Research Institute, 2002.
Cita MLA (9a ed.)
Leisinger, Klaus M., et al. Six Billion and Counting: Population and Food Security in the 21st Century. International Food Policy Research Institute, 2002.
Precaución: Estas citas no son 100% exactas.