Berger, R., & Federico, R. C. (1982). Human behavior, a social work perspective. Longman.
Lua i Stíl Chicago (17ú heag.)Berger, Robert, agus Ronald C. Federico. Human Behavior, a Social Work Perspective. New York: Longman, 1982.
Lua MLA (9ú heag.)Berger, Robert, agus Ronald C. Federico. Human Behavior, a Social Work Perspective. Longman, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.