Cita APA (7a ed.)

Graham, J. (1989). Amusement machines: Dependency and delinquency. Research bulletin / Home Office, Research and Planning Unit, 50-51.

Cita Chicago Style (17a ed.)

Graham, John. "Amusement Machines: Dependency and Delinquency." Research Bulletin / Home Office, Research and Planning Unit 1989: 50-51.

Cita MLA (9a ed.)

Graham, John. "Amusement Machines: Dependency and Delinquency." Research Bulletin / Home Office, Research and Planning Unit, 1989, pp. 50-51.