McKillip, J. (1987). Need analysis: Tools for the human services and education. Sage Publications.
Lua i Stíl Chicago (17ú heag.)McKillip, Jack. Need Analysis: Tools for the Human Services and Education. Newbury Park, Calif.: Sage Publications, 1987.
Lua MLA (8ú heag.)McKillip, Jack. Need Analysis: Tools for the Human Services and Education. Sage Publications, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.