Öberg, M., Jaakkola, M. S., Woodward, A., Peruga, A., & Prüss-Ustün, A. (2011). Worldwide burden of disease from exposure to second-hand smoke: A retrospective analysis of data from 192 countries. Lancet, 377(9760), 139. https://doi.org/10.1016/S0140-6736(10)61388-8
Chicago Style (17th ed.) CitationÖberg, Mattias, Maritta S. Jaakkola, Alistair Woodward, Armando Peruga, and Annette Prüss-Ustün. "Worldwide Burden of Disease from Exposure to Second-hand Smoke: A Retrospective Analysis of Data from 192 Countries." Lancet 377, no. 9760 (2011): 139. https://doi.org/10.1016/S0140-6736(10)61388-8.
MLA (9th ed.) CitationÖberg, Mattias, et al. "Worldwide Burden of Disease from Exposure to Second-hand Smoke: A Retrospective Analysis of Data from 192 Countries." Lancet, vol. 377, no. 9760, 2011, p. 139, https://doi.org/10.1016/S0140-6736(10)61388-8.