APA (7th ed.) Citation

Knapp, M., & Fenyo, A. (1988). Prison costs: Why the variation? Research bulletin / Home Office, Research and Planning Unit, 9-13.

Chicago Style (17th ed.) Citation

Knapp, Martin, and Andrew Fenyo. "Prison Costs: Why the Variation?" Research Bulletin / Home Office, Research and Planning Unit 1988: 9-13.

MLA (9th ed.) Citation

Knapp, Martin, and Andrew Fenyo. "Prison Costs: Why the Variation?" Research Bulletin / Home Office, Research and Planning Unit, 1988, pp. 9-13.