Não informado. (2001). Business and economic history. University of Illinois, Bureau of Economic and Business Research.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Não informado. Business and Economic History. Urbana, Ill: University of Illinois, Bureau of Economic and Business Research, 2001.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Não informado. Business and Economic History. University of Illinois, Bureau of Economic and Business Research, 2001.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.