APA (7th ed.) Citation

Pennings, P. (2006). Doing research in political science (2nd ed.). Sage.

Chicago Style (17th ed.) Citation

Pennings, Paul. Doing Research in Political Science. 2nd ed. London ; Thousand Oaks, Calif: Sage, 2006.

MLA (9th ed.) Citation

Pennings, Paul. Doing Research in Political Science. 2nd ed. Sage, 2006.