Drolet, M., Bénard, É., Pérez, N., Brisson, M., & Group, H. V. I. S. (2019). Population-level impact and herd effects following the introduction of human papillomavirus vaccination programmes: Updated systematic review and meta-analysis. Lancet, 394(10197), 497. https://doi.org/10.1016/S0140-6736(19)30298-3
Chicago Style (17th ed.) CitationDrolet, Mélanie, Élodie Bénard, Norma Pérez, Marc Brisson, and HPV Vaccination Impact Study Group. "Population-level Impact and Herd Effects Following the Introduction of Human Papillomavirus Vaccination Programmes: Updated Systematic Review and Meta-analysis." Lancet 394, no. 10197 (2019): 497. https://doi.org/10.1016/S0140-6736(19)30298-3.
MLA (9th ed.) CitationDrolet, Mélanie, et al. "Population-level Impact and Herd Effects Following the Introduction of Human Papillomavirus Vaccination Programmes: Updated Systematic Review and Meta-analysis." Lancet, vol. 394, no. 10197, 2019, p. 497, https://doi.org/10.1016/S0140-6736(19)30298-3.