APA (7th ed.) Citation

Policy Studies Organization & Nagel, S. S. (1990). Policy theory and policy evaluation: Concepts, knowledge, causes, and norms. Greenwood Press.

Chicago Style (17th ed.) Citation

Policy Studies Organization and Stuart S. Nagel. Policy Theory and Policy Evaluation: Concepts, Knowledge, Causes, and Norms. New York: Greenwood Press, 1990.

MLA (9th ed.) Citation

Policy Studies Organization and Stuart S. Nagel. Policy Theory and Policy Evaluation: Concepts, Knowledge, Causes, and Norms. Greenwood Press, 1990.