Orren, K., & Skowronek, S. (2004). The search for American political development. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Orren, Karen, agus Stephen Skowronek. The Search for American Political Development. Cambridge, [U.K.]: Cambridge University Press, 2004.
Lua MLA (9ú heag.)Orren, Karen, agus Stephen Skowronek. The Search for American Political Development. Cambridge University Press, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.