Cita APA (7a ed.)

Donohue, J. J., & Levitt, S. D. (2000). The impact of legalized abortion on crime. National Bureau of Economic Research.

Cita Chicago Style (17a ed.)

Donohue, John J., y Steven D. Levitt. The Impact of Legalized Abortion on Crime. Cambridge, MA: National Bureau of Economic Research, 2000.

Cita MLA (9a ed.)

Donohue, John J., y Steven D. Levitt. The Impact of Legalized Abortion on Crime. National Bureau of Economic Research, 2000.