Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

Grossman, Gene M., e Elhanan Helpman. Interest Groups and Trade Policy. Princeton, N.J: Princeton University Press, 2002.

Citatione MLA (9a ed.)

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