APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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