Não informado. (1919). Foreign crops and markets. U.S. Department of Agriculture, Foreign Agricultural Service.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Não informado. Foreign Crops and Markets. Washington: U.S. Department of Agriculture, Foreign Agricultural Service, 1919.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Não informado. Foreign Crops and Markets. U.S. Department of Agriculture, Foreign Agricultural Service, 1919.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.