APA (7th ed.) Zitazioa
Popova, S., & et al. (2017). Estimation of national, regional, and global prevalence of alcohol use during pregnancy and fetal alcohol syndrome: A systematic review and meta-analysis. https://doi.org/10.1016/S2214-109X(17)30021-9
Chicago Style (17th ed.) Zitazioa
Popova, S., eta et al. Estimation of National, Regional, and Global Prevalence of Alcohol Use During Pregnancy and Fetal Alcohol Syndrome: A Systematic Review and Meta-analysis. 2017. https://doi.org/10.1016/S2214-109X(17)30021-9.
MLA (9th ed.) Zitazioa
Popova, S., eta et al. Estimation of National, Regional, and Global Prevalence of Alcohol Use During Pregnancy and Fetal Alcohol Syndrome: A Systematic Review and Meta-analysis. 2017. https://doi.org/10.1016/S2214-109X(17)30021-9.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.