Cowan, D. (2009). Research issues in health and social care. M & K Update Ltd..
Lua i Stíl Chicago (17ú heag.)Cowan, David. Research Issues in Health and Social Care. Keswick, Cumbria [England]: M & K Update Ltd., 2009.
Lua MLA (9ú heag.)Cowan, David. Research Issues in Health and Social Care. M & K Update Ltd., 2009.
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