Horton, P. B. Sociologia.
Lua i Stíl Chicago (17ú heag.)Horton, Paul B.Hunt. Sociologia.
Lua MLA (8ú heag.)Horton, Paul B.Hunt. Sociologia.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Lua APA (7ú heag.)