Humane Society International. “An HSI Report: The Impact of Industrialized Animal Agriculture on World Hunger”. FAO.org. Food and Agriculture Organization. Aufgerufen am 17.07.2017.

http://www.fao.org/fileadmin/user_upload/animalwelfare/HSI–The%20Impact%20of%20Industrialized%20Animal%20Agriculture%20on%20World%20Hunger.pdf