APA (7th ed.) Citation

Nagel, S. S., & Long, J. M. (1985). Policy evaluation: P/G % (Version 8.7.). National Collegiate Software Clearinghouse, School of Humanities and Social Sciences, North Carolina State University.

Chicago Style (17th ed.) Citation

Nagel, Stuart S., and John M. Long. Policy Evaluation: P/G %. Version 8.7. Raleigh, NC: National Collegiate Software Clearinghouse, School of Humanities and Social Sciences, North Carolina State University, 1985.

MLA (9th ed.) Citation

Nagel, Stuart S., and John M. Long. Policy Evaluation: P/G %. Version 8.7. National Collegiate Software Clearinghouse, School of Humanities and Social Sciences, North Carolina State University, 1985.