Hanson, G. H., & Spilimbergo, A. (1999). Political economy, sectoral shocks, and border enforcement. National Bureau of Economic Research.
Chicago-viite (17. p.)Hanson, Gordon H., ja Antonio Spilimbergo. Political Economy, Sectoral Shocks, and Border Enforcement. Cambridge, Mass: National Bureau of Economic Research, 1999.
MLA-viite (9. p.)Hanson, Gordon H., ja Antonio Spilimbergo. Political Economy, Sectoral Shocks, and Border Enforcement. National Bureau of Economic Research, 1999.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.