Cita APA (7a ed.)

Grossman, G. M., & Helpman, E. (2002). Interest groups and trade policy. Princeton University Press.

Cita Chicago Style (17a ed.)

Grossman, Gene M., y Elhanan Helpman. Interest Groups and Trade Policy. Princeton, N.J. [etc.]: Princeton University Press, 2002.

Cita MLA (9a ed.)

Grossman, Gene M., y Elhanan Helpman. Interest Groups and Trade Policy. Princeton University Press, 2002.