APA (7th ed.) Zitazioa

Howlett, M. (2009). Studying public policy: Policy cycles & policy subsystems. Oxford University Pr..

Chicago Style (17th ed.) Zitazioa

Howlett, Michael. Studying Public Policy: Policy Cycles & Policy Subsystems. Oxford: Oxford University Pr., 2009.

MLA (9th ed.) Zitazioa

Howlett, Michael. Studying Public Policy: Policy Cycles & Policy Subsystems. Oxford University Pr., 2009.