University of South Carolina. Bureau of Business and Economic Research. Essays in economics. University of South Carolina, Bureau of Business and Economic Research.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)University of South Carolina. Bureau of Business and Economic Research. Essays in Economics. Columbia, S.C.: University of South Carolina, Bureau of Business and Economic Research.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)University of South Carolina. Bureau of Business and Economic Research. Essays in Economics. University of South Carolina, Bureau of Business and Economic Research.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.