National food review Economics, Statistics, and Cooperatives Service, U.S. Department of Agriculture. [electronic resource].
Cita Chicago (17th ed.)National Food Review Economics, Statistics, and Cooperatives Service, U.S. Department of Agriculture. [electronic Resource].
Cita MLA (9th ed.)National Food Review Economics, Statistics, and Cooperatives Service, U.S. Department of Agriculture. [electronic Resource].
Atenció: Aquestes cites poden no estar 100% correctes.