Friedlander, W. (1976). Concepts and methods of social work (2nd ed.). Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Friedlander, Walter. Concepts and Methods of Social Work. 2nd ed. New Jersey: Prentice-Hall, 1976.
Lua MLA (9ú heag.)Friedlander, Walter. Concepts and Methods of Social Work. 2nd ed. Prentice-Hall, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.