Cita APA (7a ed.)

Rich, R. W., & Tracy, J. (2000). Uncertainty and labor contract durations. National Bureau of Economic Research.

Cita Chicago Style (17a ed.)

Rich, Robert W., y Joseph Tracy. Uncertainty and Labor Contract Durations. Cambridge, MA: National Bureau of Economic Research, 2000.

Cita MLA (9a ed.)

Rich, Robert W., y Joseph Tracy. Uncertainty and Labor Contract Durations. National Bureau of Economic Research, 2000.