Rich, R. C., Brians, C. L., Manheim, J. B., & Willnat, L. (2018). Empirical political analysis: Quantitative and qualitative research methods (Ninth edition.). Routledge.
Chicago Style (17th ed.) CitationRich, Richard C., Craig Leonard Brians, Jarol B. Manheim, and Lars Willnat. Empirical Political Analysis: Quantitative and Qualitative Research Methods. Ninth edition. New York ; London: Routledge, 2018.
MLA (9th ed.) CitationRich, Richard C., et al. Empirical Political Analysis: Quantitative and Qualitative Research Methods. Ninth edition. Routledge, 2018.
Warning: These citations may not always be 100% accurate.