APA aipamena

Keller, W. (1999). How trade patterns and technology flows affect productivity growth. National Bureau of Economic Research.

Chicago Style aipamena

Keller, Wolfgang. How Trade Patterns and Technology Flows Affect Productivity Growth. Cambridge: National Bureau of Economic Research, 1999.

MLA aipamena

Keller, Wolfgang. How Trade Patterns and Technology Flows Affect Productivity Growth. National Bureau of Economic Research, 1999.