rudolph, j. (1958). balance of national economy-an instrument of long term planning. the institute of national planning.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)rudolph, johannes. Balance of National Economy-an Instrument of Long Term Planning. cairo: the institute of national planning, 1958.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)rudolph, johannes. Balance of National Economy-an Instrument of Long Term Planning. the institute of national planning, 1958.