US Department of Agriculture. (1956). Agricultural marketing. U.S. Department of Agriculture, Agricultural Marketing Service.
Citação do estilo Chicago (17ª ed.)US Department of Agriculture. Agricultural Marketing. Washington: U.S. Department of Agriculture, Agricultural Marketing Service, 1956.
Citação MLA (8ª ed.)US Department of Agriculture. Agricultural Marketing. U.S. Department of Agriculture, Agricultural Marketing Service, 1956.
Atenció: Aquestes cites poden no estar 100% correctes.