Dyfyniad APA
National Bureau of Economic Research, ebrary, Inc, & Feenstra, R. C. (1997). The effects of U.S. trade protection and promotion policies. University of Chicago Press.
Dyfyniad Arddull Chicago
National Bureau of Economic Research, Inc ebrary, and Robert C. Feenstra. The Effects of U.S. Trade Protection and Promotion Policies. Chicago: University of Chicago Press, 1997.
Dyfyniad MLA
National Bureau of Economic Research, et al. The Effects of U.S. Trade Protection and Promotion Policies. University of Chicago Press, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.