APA aipamena

Heckman, J. J., Lochner, L., & Taber, C. (1998). Tax policy and human capital formation. National Bureau of Economic Research.

Chicago Style aipamena

Heckman, James J., Lance Lochner, and Christopher Taber. Tax Policy and Human Capital Formation. Cambridge: National Bureau of Economic Research, 1998.

MLA aipamena

Heckman, James J., et al. Tax Policy and Human Capital Formation. National Bureau of Economic Research, 1998.