APA

Nagel S. S., . (2001). Handbook of public policy evaluation. Thousand Oaks (California, Estados Unidos): Sage Publications.

Chicago

Nagel Stuart S, . 2001. Handbook of public policy evaluation. Thousand Oaks (California, Estados Unidos): Sage Publications.

Harvard

Nagel S. S., . (2001). Handbook of public policy evaluation. Thousand Oaks (California, Estados Unidos): Sage Publications.

MLA

Nagel Stuart S, . Handbook of public policy evaluation. Thousand Oaks (California, Estados Unidos): Sage Publications. 2001.