Cita APA (7a ed.)

National Council on Crime and Delinquency, Research Center, & National Council on Crime and Delinquency Research Center. (1980). Improving classification: A guide to evaluation. Research Center.

Cita Chicago Style (17a ed.)

National Council on Crime and Delinquency, Research Center, y National Council on Crime and Delinquency Research Center. Improving Classification: A Guide to Evaluation. San Francisco, Cal: Research Center, 1980.

Cita MLA (8a ed.)

National Council on Crime and Delinquency, Research Center, y National Council on Crime and Delinquency Research Center. Improving Classification: A Guide to Evaluation. Research Center, 1980.