Bems, R., & Carvalho Filho, I. d. (2009). Exchange rate assessments: Methodologies for oil exporting countries. International Monetary Fund, Research Department.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Bems, Rudolfs, و Irineu de Carvalho Filho. Exchange Rate Assessments: Methodologies for Oil Exporting Countries. [Washington, D.C.]: International Monetary Fund, Research Department, 2009.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Bems, Rudolfs, و Irineu de Carvalho Filho. Exchange Rate Assessments: Methodologies for Oil Exporting Countries. International Monetary Fund, Research Department, 2009.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.