Cita APA (7a ed.)

Cullen, J. B. 1., & Levitt, S. D. (1996). Crime, urban flight, and the consequences for cities. Working paper.

Cita Chicago Style (17a ed.)

Cullen, Julie Berry 19XX-, y Steven D. Levitt. "Crime, Urban Flight, and the Consequences for Cities." Working Paper 1996.

Cita MLA (9a ed.)

Cullen, Julie Berry 19XX-, y Steven D. Levitt. "Crime, Urban Flight, and the Consequences for Cities." Working Paper, 1996.