Παραπομπή σε μορφή APA (7η εκδ.)

Silva, P. A. d. (2005). The role of importers and exporters in the determination of the U.S. tariff preferences granted to Latin America. World Bank.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Silva, Peri Agostinho da. The Role of Importers and Exporters in the Determination of the U.S. Tariff Preferences Granted to Latin America. Washington, D.C: World Bank, 2005.

Παραπομπή σε μορφή MLA (9th εκδ.)

Silva, Peri Agostinho da. The Role of Importers and Exporters in the Determination of the U.S. Tariff Preferences Granted to Latin America. World Bank, 2005.