Hepworth, D. H. (1989). Direct social work practice: Theory and skills (3rd ed.). Wadsworth.
Lua i Stíl Chicago (17ú heag.)Hepworth, Dean H. Direct Social Work Practice: Theory and Skills. 3rd ed. California: Wadsworth, 1989.
Lua MLA (9ú heag.)Hepworth, Dean H. Direct Social Work Practice: Theory and Skills. 3rd ed. Wadsworth, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.