Davies, M., & Ball, C. (1985). The essential social worker: A guide to positive practice (2nd ed.). Gower.
Lua i Stíl Chicago (17ú heag.)Davies, Martin, agus Caroline Ball. The Essential Social Worker: A Guide to Positive Practice. 2nd ed. Aldershot, Hants, England: Gower, 1985.
Lua MLA (9ú heag.)Davies, Martin, agus Caroline Ball. The Essential Social Worker: A Guide to Positive Practice. 2nd ed. Gower, 1985.
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