Cita APA (7th ed.)

Howlett, M., Ramesh, M., & Perl, A. (2020). Studying public policy: Policy cycles & policy subsystems (4th ed.). Oxford University Press.

Cita Chicago (17th ed.)

Howlett, Michael, M. Ramesh, i Anthony Perl. Studying Public Policy: Policy Cycles & Policy Subsystems. 4th ed. Oxford: Oxford University Press, 2020.

Cita MLA (9th ed.)

Howlett, Michael, et al. Studying Public Policy: Policy Cycles & Policy Subsystems. 4th ed. Oxford University Press, 2020.