1. World Health Organization (WHO) WHO Framework Convention on tobacco control 2003 http://apps.who.int/iris/bitstream/10665/42811/1/9241591013.pdf?ua=1 http://www.webcitation.org/6oFBNRGGq
2. World Health Organization (WHO) Conference of the Parties to the WHO Framework Convention on tobacco control http://apps.who.int/gb/fctc/PDF/cop4/FCTC_COP4_REC1.pdf http://www.webcitation.org/6oFFMxHXu
3. World Health Organization (WHO) FCTC/COP4(8) guidelines for implementation of Article 14 of the WHO Framework Convention on tobacco control 2010 http://www.who.int/fctc/Guidelines.pdf?ua=1 http://www.webcitation.org/6oFCXDlo6
4. A survey of tobacco dependence treatment services in 121 countries;Pine-Abata;Addiction,2013
5. World Health Organization (WHO) World Bank country and lending groups: the World Bank; 2014 http://blogs.worldbank.org/opendata/new-country-classifications http://www.webcitation.org/6oFD6JKOk