Knill, C., & Tosun Jale. (2020). Public policy: A new introduction (2nd ed.). Macmillan international higher education.

Knill, Christoph, and Tosun Jale. Public Policy: A New Introduction. 2nd ed. London: Macmillan international higher education, 2020.

Knill, Christoph, and Tosun Jale. Public Policy: A New Introduction. 2nd ed. Macmillan international higher education, 2020.