SCHAEFER, R. T. (2001). Sociology [ada cd]Richard T. Schaefer. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)SCHAEFER, Richard T. Sociology [ada Cd]Richard T. Schaefer. McGraw-Hill, 2001.
Lua MLA (8ú heag.)SCHAEFER, Richard T. Sociology [ada Cd]Richard T. Schaefer. McGraw-Hill, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.