Ranis, G. (1972). The Gap between rich and poor nations: Proceedings of a conference held by the International Economic Association at Bled, Yugoslavia. Macmillan; St. Martin's P..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ranis, Gustav. The Gap Between Rich and Poor Nations: Proceedings of a Conference Held by the International Economic Association at Bled, Yugoslavia. London, New York: Macmillan; St. Martin's P., 1972.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ranis, Gustav. The Gap Between Rich and Poor Nations: Proceedings of a Conference Held by the International Economic Association at Bled, Yugoslavia. Macmillan; St. Martin's P., 1972.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.