Organic Agriculture Worldwide, 2012. IFOAM-FiBL Survey. Number of Producers.
More information on the publication The World of Organic Agriculture 2012 can be found at http://shop.ifoam.org/bookstore/product_info.php?products_id=559
Organic Agricultrue 2012 - Key data, Table: Organic agricultural land, share of total agricultural land, number of producers, domestic sales 2010 from "The World of Organic Agriculture 2012" (http://www.goo.gl/kZYKX) at http://www.organic-world.net/, viewed 1st March, 2012.
Organic Agriculture, 2012. Number of producers., ChartsBin.com, viewed 21st September, 2019, <http://chartsbin.com/view/5167>.