Cita APA (7th ed.)

Whalley, J. (1996). Why do countries seek regional trade agreementsn. National Bureau of Economic Research.

Cita Chicago (17th ed.)

Whalley, John. Why Do Countries Seek Regional Trade Agreementsn. Cambridge: National Bureau of Economic Research, 1996.

Cita MLA (9th ed.)

Whalley, John. Why Do Countries Seek Regional Trade Agreementsn. National Bureau of Economic Research, 1996.