Cita APA (7th ed.)

Levinsohn, J., & Petrin, A. (1999). When industries become more productive, do firmsn: Investigating productivity dynamics. National Bureau of Economic Research.

Cita Chicago (17th ed.)

Levinsohn, James, i Amil Petrin. When Industries Become More Productive, Do Firmsn: Investigating Productivity Dynamics. Cambridge: National Bureau of Economic Research, 1999.

Cita MLA (9th ed.)

Levinsohn, James, i Amil Petrin. When Industries Become More Productive, Do Firmsn: Investigating Productivity Dynamics. National Bureau of Economic Research, 1999.