Cita APA (7a ed.)

Evans, R., & Ellis, R. (1997). Police cautioning in the 1990s. Research findings, 52, 1-4.

Cita Chicago Style (17a ed.)

Evans, Roger, y Rachel Ellis. "Police Cautioning in the 1990s." Research Findings 52 (1997): 1-4.

Cita MLA (9a ed.)

Evans, Roger, y Rachel Ellis. "Police Cautioning in the 1990s." Research Findings, 52, 1997, pp. 1-4.