Cita APA (7a ed.)

Donohue, J. J., & Levitt, S. D. (2001). The impact of legalized abortion and crime. The quarterly journal of economics, 379-420. doi:10.1162/00335530151144050

Cita Chicago Style (17a ed.)

Donohue, John J., y Steven D. Levitt. "The Impact of Legalized Abortion and Crime." The Quarterly Journal of Economics 2001: 379-420. https://doi.org/10.1162/00335530151144050.

Cita MLA (9a ed.)

Donohue, John J., y Steven D. Levitt. "The Impact of Legalized Abortion and Crime." The Quarterly Journal of Economics, 2001, pp. 379-420, https://doi.org/10.1162/00335530151144050.