Howlett, M. (2009). Studying public policy: Policy cycles & policy subsystems. Oxford University Pr..
Cita Chicago (17th ed.)Howlett, Michael. Studying Public Policy: Policy Cycles & Policy Subsystems. Oxford: Oxford University Pr., 2009.
Cita MLA (9th ed.)Howlett, Michael. Studying Public Policy: Policy Cycles & Policy Subsystems. Oxford University Pr., 2009.
Atenció: Aquestes cites poden no estar 100% correctes.