Allen, P. (1998). Global perspectives on agroecology and sustainable agricultural systems: Proceedings of the Sixth International Scientific Conference of the International Federation of Organic Agriculture Movements. Santa Cruz: Agroecology Program University of California.
Chicago-tyylinen lähdeviittausAllen, Patricia. Global Perspectives On Agroecology and Sustainable Agricultural Systems: Proceedings of the Sixth International Scientific Conference of the International Federation of Organic Agriculture Movements. Santa Cruz: Agroecology Program University of California, 1998.
MLA-viiteAllen, Patricia. Global Perspectives On Agroecology and Sustainable Agricultural Systems: Proceedings of the Sixth International Scientific Conference of the International Federation of Organic Agriculture Movements. Santa Cruz: Agroecology Program University of California, 1998.