APA (7th ed.) Citation

Heckman, J. J., & Smith, J. A. (1997). The sensitivity of experimental impact estimates: Evidence from the national JTPA study. National Bureau of Economic Research.

Chicago Style (17th ed.) Citation

Heckman, James J., and Jeffrey A. Smith. The Sensitivity of Experimental Impact Estimates: Evidence from the National JTPA Study. Cambridge: National Bureau of Economic Research, 1997.

MLA (9th ed.) Citation

Heckman, James J., and Jeffrey A. Smith. The Sensitivity of Experimental Impact Estimates: Evidence from the National JTPA Study. National Bureau of Economic Research, 1997.