Tham khảo Thuốc_lá_không_khói

  1. ↑ Czoli, Christine D; Fong, Geoffrey T; Mays, Darren; Hammond, David (2016). “How do consumers perceive differences in risk across nicotine products? A review of relative risk perceptions across smokeless tobacco, e-cigarettes, nicotine replacement therapy and combustible cigarettes”. Tobacco Control. 26 (e1): tobaccocontrol–2016–053060. doi:10.1136/tobaccocontrol-2016-053060. ISSN 0964-4563. PMID 27625408.
  2. ↑ “Protecting Smokers, Saving Lives”. Google Books. Truy cập 10 tháng 10 năm 2018.