Alvarez, R. M., & Brehm, J. (2002). Hard choices, easy answers: Values, information, and american public opinion. Princeton University Press.
Lua i Stíl Chicago (17ú heag.)Alvarez, R. Michael, agus John Brehm. Hard Choices, Easy Answers: Values, Information, and American Public Opinion. Princeton: Princeton University Press, 2002.
Lua MLA (9ú heag.)Alvarez, R. Michael, agus John Brehm. Hard Choices, Easy Answers: Values, Information, and American Public Opinion. Princeton University Press, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.