Federico, R. C. (1990). Social welfare in today's world. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Federico, Ronald C. Social Welfare in Today's World. New York: McGraw-Hill, 1990.
Lua MLA (8ú heag.)Federico, Ronald C. Social Welfare in Today's World. McGraw-Hill, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.