Cita APA (7a ed.)

Kortum, S., & Lerner, J. (1997). Stronger protection or technological revolution: What is behind the recent surge in patenting? National Bureau of Economic Research.

Cita Chicago Style (17a ed.)

Kortum, Samuel, y Joshua Lerner. Stronger Protection or Technological Revolution: What Is Behind the Recent Surge in Patenting? Cambridge, MA: National Bureau of Economic Research, 1997.

Cita MLA (9a ed.)

Kortum, Samuel, y Joshua Lerner. Stronger Protection or Technological Revolution: What Is Behind the Recent Surge in Patenting? National Bureau of Economic Research, 1997.