Henning Steinfeld; Pierre Gerber; Tom Wassenaar; Vincent Castel; Mauricio Rosales; Cees de Haan (2006). Livestock's long shadow(PDF) (Report). FAO. ISBN978-92-5-105571-7. Retrieved 27 September 2019.
Livestock's long shadow: environmental issues and options. Steinfeld, Henning., Food and Agriculture Organization of the United Nations., Livestock, Environment and Development (Firm). Rome: Food and Agriculture Organization of the United Nations. 2006. p. xxi. ISBN978-92-5-105571-7. OCLC77563364.{{cite book}}: CS1 maint: others (link)