MARCUS, D. A., & COPE, D. K. (2009). Chronic Pain. Clinical Publishing.
Lua i Stíl Chicago (17ú heag.)MARCUS, Dawn A., agus Doris K. COPE. Chronic Pain. Clinical Publishing, 2009.
Lua MLA (9ú heag.)MARCUS, Dawn A., agus Doris K. COPE. Chronic Pain. Clinical Publishing, 2009.
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