Cita APA (7a ed.)

Keller, W. (2001). International technology diffusion. National Bureau of Economic Research.

Cita Chicago Style (17a ed.)

Keller, Wolfgang. International Technology Diffusion. Cambridge, MA: National Bureau of Economic Research, 2001.

Cita MLA (9a ed.)

Keller, Wolfgang. International Technology Diffusion. National Bureau of Economic Research, 2001.