Citazione Stile APA (7a Edizione)

Irwin, D. A. (1996). Changes in U.S. tariffs: Prices or policiesn. National Bureau of Economic Research.

Citazione stile Chigago Style (17a edizione)

Irwin, Douglas A. Changes in U.S. Tariffs: Prices or Policiesn. Cambridge: National Bureau of Economic Research, 1996.

Citatione MLA (9a ed.)

Irwin, Douglas A. Changes in U.S. Tariffs: Prices or Policiesn. National Bureau of Economic Research, 1996.