Clawson, R. A., & Oxley, Z. M. (2013). Public opinion: Democratic ideals, democratic practice (2nd ed.). Sage/CQ Press.
Lua i Stíl Chicago (17ú heag.)Clawson, Rosalee A., agus Zoe M. Oxley. Public Opinion: Democratic Ideals, Democratic Practice. 2nd ed. Los Angeles: Sage/CQ Press, 2013.
Lua MLA (9ú heag.)Clawson, Rosalee A., agus Zoe M. Oxley. Public Opinion: Democratic Ideals, Democratic Practice. 2nd ed. Sage/CQ Press, 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.