Fretwell, D. (1993). Developing effective employment services. World Bank.
Lua i Stíl Chicago (17ú heag.)Fretwell, David. Developing Effective Employment Services. Washington, D.C: World Bank, 1993.
Lua MLA (9ú heag.)Fretwell, David. Developing Effective Employment Services. World Bank, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.