Winkler, V., Lan, Y., & Becher, H. (2015). Tobacco prevention policies in west-African countries and their effects on smoking prevalence. BMC Public Health.
Čikaški stil citiranjaWinkler, Volker, Yong Lan, i Heiko Becher. "Tobacco Prevention Policies in West-African Countries and Their Effects On Smoking Prevalence." BMC Public Health 2015.
MLA način citiranjaWinkler, Volker, Yong Lan, i Heiko Becher. "Tobacco Prevention Policies in West-African Countries and Their Effects On Smoking Prevalence." BMC Public Health 2015.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.