Heckman, J. J., & Smith, J. A. (1997). The sensitivity of experimental impact estimates: Evidence from the national JTPA study. National Bureau of Economic Research.
Цитирование в стиле Чикаго (17-е изд.)Heckman, James J., и Jeffrey A. Smith. The Sensitivity of Experimental Impact Estimates: Evidence from the National JTPA Study. Cambridge: National Bureau of Economic Research, 1997.
Цитирование MLA (9-е изд.)Heckman, James J., и Jeffrey A. Smith. The Sensitivity of Experimental Impact Estimates: Evidence from the National JTPA Study. National Bureau of Economic Research, 1997.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.