Não informado. (1953). World agricultural situation. U.S. Department of Agriculture, Economic Research Service.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. World Agricultural Situation. Washington: U.S. Department of Agriculture, Economic Research Service, 1953.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. World Agricultural Situation. U.S. Department of Agriculture, Economic Research Service, 1953.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.