Levitt, K. L., & Wharf, B. (1985). The Challenge of child welfare. University of British Columbia Press.
Lua i Stíl Chicago (17ú heag.)Levitt, Kenneth L., agus Brian Wharf. The Challenge of Child Welfare. Vancouver: University of British Columbia Press, 1985.
Lua MLA (8ú heag.)Levitt, Kenneth L., agus Brian Wharf. The Challenge of Child Welfare. University of British Columbia Press, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.