1. Budi Winarno. (2016). Public Policy in the Era of Globalization (Theory, Process and Comparative Case Studies). CAPC (Center Of Academic Publishing Services).
2. Creswell, J. W. (2014). Research Design (Qualitative, Quantitative, and Mixed Approaches). Student Library.
3. Creswell, J. W. (2016). Research Design: Qualitative, Quantitative, and Mixed Methods Approaches. Student Library.
4. Creswell, J. W. (2018). Research Design Qualitative, Quantitative, and Mixed Methods Approaches (Second Edi). University of Nebraska.
5. Dunn, W. N. (2003). Introduction to Public Policy Analysis (Second Edition), trans. Samodra Wibawa, et al, (Yogyakarta: Gadjah Mada University Press, 2000), 2–3.