Scarpitti, F. R. (1980). Social problems. Holt, Rinehart & Winston.
Lua i Stíl Chicago (17ú heag.)Scarpitti, Frank R. Social Problems. New York: Holt, Rinehart & Winston, 1980.
Lua MLA (9ú heag.)Scarpitti, Frank R. Social Problems. Holt, Rinehart & Winston, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.