Stead, L., & Lancaster, T. (2007). The Cochrane review on nicotine replacement therapy: Incorrect or uncertain classifications of additional support levels - Authors' response.
Chicago-referens (17:e uppl.)Stead, L., och T. Lancaster. The Cochrane Review on Nicotine Replacement Therapy: Incorrect or Uncertain Classifications of Additional Support Levels - Authors' Response. 2007.
MLA-referens (9:e uppl.)Stead, L., och T. Lancaster. The Cochrane Review on Nicotine Replacement Therapy: Incorrect or Uncertain Classifications of Additional Support Levels - Authors' Response. 2007.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.