Cita APA (7a ed.)

Heckman, J. J., Heinrich, C. J., & Smith, J. A. (2002). The performance of performance standards ([Rev.].). National Bureau of Economic Research.

Cita Chicago Style (17a ed.)

Heckman, James Joseph, Carolyn J. Heinrich, y Jeffrey A. Smith. The Performance of Performance Standards. [Rev.]. Cambridge, MA: National Bureau of Economic Research, 2002.

Cita MLA (9a ed.)

Heckman, James Joseph, et al. The Performance of Performance Standards. [Rev.]. National Bureau of Economic Research, 2002.