APA Style

Birkland, T, A. (2019). An Introduction to the Policy Process : Theories, Concepts, and Models of Public Policy Making (5th ed.). New York: Routledge.

MLA Style

Birkland, Thomas, A. "An Introduction to the Policy Process : Theories, Concepts, and Models of Public Policy Making". 5th ed. New York: Routledge, 2019. Text.