Irwin, D. A. (1998). Did late nineteenth century U.S. tariffs promote infant industriesn: Evidence from the tinplate industry. National Bureau of Economic Research.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Irwin, Douglas A. Did Late Nineteenth Century U.S. Tariffs Promote Infant Industriesn: Evidence from the Tinplate Industry. Cambridge: National Bureau of Economic Research, 1998.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Irwin, Douglas A. Did Late Nineteenth Century U.S. Tariffs Promote Infant Industriesn: Evidence from the Tinplate Industry. National Bureau of Economic Research, 1998.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.