Pennings, P., Keman, H., & Kleinnijenhuis, J. (1999). Doing research in political science: An introduction to comparative methods and statistics. Sage.
Chicago Style (17th ed.) CitationPennings, Paul, Hans Keman, and J. Kleinnijenhuis. Doing Research in Political Science: An Introduction to Comparative Methods and Statistics. London: Sage, 1999.
MLA (9th ed.) CitationPennings, Paul, et al. Doing Research in Political Science: An Introduction to Comparative Methods and Statistics. Sage, 1999.
Warning: These citations may not always be 100% accurate.