Cita APA (7a ed.)
Pennings, P., Keman, H., & Kleinnijenhuis, J. (2006). Doing research in political science (2nd ed.). Sage.
Cita Chicago Style (17a ed.)
Pennings, Paul, Hans Keman, y J. Kleinnijenhuis. Doing Research in Political Science. 2nd ed. London ; Thousand Oaks, Calif.: Sage, 2006.
Cita MLA (9a ed.)
Pennings, Paul, et al. Doing Research in Political Science. 2nd ed. Sage, 2006.
Precaución: Estas citas no son 100% exactas.