Wells, K., & Biegel, D. E. (1991). Family preservation services: Research and evaluation. Sage Publications.
Lua i Stíl Chicago (17ú heag.)Wells, Kathleen, agus David E. Biegel. Family Preservation Services: Research and Evaluation. Newbury Park, Calif. ; London ; New Delhi: Sage Publications, 1991.
Lua MLA (8ú heag.)Wells, Kathleen, agus David E. Biegel. Family Preservation Services: Research and Evaluation. Sage Publications, 1991.
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