Ritzer, G. (2003). Contemporary sociological theory and its classical roots. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Ritzer, George. Contemporary Sociological Theory and Its Classical Roots. McGraw-Hill, 2003.
Lua MLA (8ú heag.)Ritzer, George. Contemporary Sociological Theory and Its Classical Roots. McGraw-Hill, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.