Jr, A. S., H, Á., & GD, S. (2001). Environmental tobacco smoke and periodontal disease in the United States. American Journal of Public Health, 91(2), 253. https://doi.org/10.2105/ajph.91.2.253
Chicago Style (17th ed.) CitationJr, Arbes SJ, Ágústsdóttir H, and Slade GD. "Environmental Tobacco Smoke and Periodontal Disease in the United States." American Journal of Public Health 91, no. 2 (2001): 253. https://doi.org/10.2105/ajph.91.2.253.
MLA (9th ed.) CitationJr, Arbes SJ, et al. "Environmental Tobacco Smoke and Periodontal Disease in the United States." American Journal of Public Health, vol. 91, no. 2, 2001, p. 253, https://doi.org/10.2105/ajph.91.2.253.
Warning: These citations may not always be 100% accurate.