Valdes, R., & Engel, E. (2000). Optimal Fiscal Strategy for Oil Exporting Countries. International Monetary Fund.
芝加哥风格引文Valdes, Rodrigo, 与 Eduardo Engel. Optimal Fiscal Strategy for Oil Exporting Countries. Washington, D.C.: International Monetary Fund, 2000.
MLA引文Valdes, Rodrigo, 与 Eduardo Engel. Optimal Fiscal Strategy for Oil Exporting Countries. International Monetary Fund, 2000.
警告：这些引文格式不一定是100％准确.