Friedlnder, W. A., & Apte, R. Z. (1980). Introduction to social welfare (5th ed.). Prentice-Hall Inc..
Lua i Stíl Chicago (17ú heag.)Friedlnder, Walter A., agus Robert Z. Apte. Introduction to Social Welfare. 5th ed. New Jersey: Prentice-Hall Inc., 1980.
Lua MLA (9ú heag.)Friedlnder, Walter A., agus Robert Z. Apte. Introduction to Social Welfare. 5th ed. Prentice-Hall Inc., 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.