Cita APA (7a ed.)

Hearnden, I., & Harocopos, A. (2000). Problem drug use and probation in London. Research findings, 112, 1-4.

Cita Chicago Style (17a ed.)

Hearnden, Ian, y Alex Harocopos. "Problem Drug Use and Probation in London." Research Findings 112 (2000): 1-4.

Cita MLA (8a ed.)

Hearnden, Ian, y Alex Harocopos. "Problem Drug Use and Probation in London." Research Findings, vol. 112, 2000, pp. 1-4.