Cita APA (7a ed.)

Siegel, L. (1979). Policing urban mass transit systems. National Evaluation Program.

Cita Chicago Style (17a ed.)

Siegel, L. "Policing Urban Mass Transit Systems." National Evaluation Program 1979.

Cita MLA (9a ed.)

Siegel, L. "Policing Urban Mass Transit Systems." National Evaluation Program, 1979.