6Agriculture and Horticulture Development Board.Pocket book 2011 EU [R].Dairy Co. 2011.
7Agriculture and Horticttlture Development Board. Dairy Supply Chain Margins[ R ].Dairy Co,2011(11).
8Alden C. Manchester and Don P. Blayney. Milk Pricing in the United States [ R ]. Agriculture Information Bulletin No. 761.Market and Trade Economics Division,Economic Research.Service, U.S. Department of Agriculture.