Springer, J. F., Haas, P. J., & Porowski, A. (2017). Applied policy research: Concepts and cases (Second edition.). Routledge.
Lua i Stíl Chicago (17ú heag.)Springer, J. Frederick, Peter J. Haas, agus Allan Porowski. Applied Policy Research: Concepts and Cases. Second edition. New York: Routledge, 2017.
Lua MLA (9ú heag.)Springer, J. Frederick, et al. Applied Policy Research: Concepts and Cases. Second edition. Routledge, 2017.
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