APA (7th ed.) Zitazioa
Filippidis, F., & et al. (2016). Two-year trends and predictors of e-cigarette use in 27 European Union member states. https://doi.org/10.1136/tobaccocontrol-2015-052771
Chicago Style (17th ed.) Zitazioa
Filippidis, F., eta et al. Two-year Trends and Predictors of E-cigarette Use in 27 European Union Member States. 2016. https://doi.org/10.1136/tobaccocontrol-2015-052771.
MLA (9th ed.) Zitazioa
Filippidis, F., eta et al. Two-year Trends and Predictors of E-cigarette Use in 27 European Union Member States. 2016. https://doi.org/10.1136/tobaccocontrol-2015-052771.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.