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Lua i Stíl Chicago (17ú heag.)Hajek, P., L. Stead, R. West, agus M. Jarvis. Relapse Prevention Interventions for Smoking Cessation. 2005.
Lua MLA (9ú heag.)Hajek, P., et al. Relapse Prevention Interventions for Smoking Cessation. 2005.
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