Dyfyniad APA

Keller, W. (1997). Trade and the transmission of technology. National Bureau of Economic Research.

Dyfyniad Arddull Chicago

Keller, Wolfgang. Trade and the Transmission of Technology. Cambridge: National Bureau of Economic Research, 1997.

Dyfyniad MLA

Keller, Wolfgang. Trade and the Transmission of Technology. National Bureau of Economic Research, 1997.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.