Citazione Stile APA (7a Edizione)

Valdes, R., & Engel, E. (2000). Optimal Fiscal Strategy for Oil Exporting Countries. International Monetary Fund.

Citazione stile Chigago Style (17a edizione)

Valdes, Rodrigo, e Eduardo Engel. Optimal Fiscal Strategy for Oil Exporting Countries. Washington, D.C.: International Monetary Fund, 2000.

Citatione MLA (8a ed.)

Valdes, Rodrigo, e Eduardo Engel. Optimal Fiscal Strategy for Oil Exporting Countries. International Monetary Fund, 2000.