Cita APA (7a ed.)

Ellwood, D. T., & Liebman, J. B. (2000). The middle class parent penalty: Child benefits in the U.S. tax code. National Bureau of Economic Research.

Cita Chicago Style (17a ed.)

Ellwood, David T., y Jeffrey B. Liebman. The Middle Class Parent Penalty: Child Benefits in the U.S. Tax Code. Cambridge, MA: National Bureau of Economic Research, 2000.

Cita MLA (9a ed.)

Ellwood, David T., y Jeffrey B. Liebman. The Middle Class Parent Penalty: Child Benefits in the U.S. Tax Code. National Bureau of Economic Research, 2000.