the economic outlook for 1981. the university of Michigan Ann arbor. (1981). the economic outlook for 1981: Papers presented to the economic and social outlook conference. research seminar in quantitative economics.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)the economic outlook for 1981. the university of Michigan Ann arbor. The Economic Outlook for 1981: Papers Presented to the Economic and Social Outlook Conference. michigan: research seminar in quantitative economics, 1981.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)the economic outlook for 1981. the university of Michigan Ann arbor. The Economic Outlook for 1981: Papers Presented to the Economic and Social Outlook Conference. research seminar in quantitative economics, 1981.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.