Cita APA (7a ed.)

Caputo, T., & Ryan, C. (1991). The police response to youth at risk. User report.

Cita Chicago Style (17a ed.)

Caputo, Tullio, y Colleen Ryan. "The Police Response to Youth at Risk." User Report 1991.

Cita MLA (8a ed.)

Caputo, Tullio, y Colleen Ryan. "The Police Response to Youth at Risk." User Report, 1991.