Citação norma APA

Pennings, P., Keman, H., & Kleinnijenhuis, J. (1999). Doing research in political science: An introduction to comparative methods and statistics. Sage.

Citação norma Chicago

Pennings, Paul, Hans Keman, and Jan Kleinnijenhuis. Doing Research in Political Science: An Introduction to Comparative Methods and Statistics. London: Sage, 1999.

Citação norma MLA

Pennings, Paul, et al. Doing Research in Political Science: An Introduction to Comparative Methods and Statistics. Sage, 1999.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.