Ryan, H., Gfroerer, J., & Trosclair, A. (2012). Adult current smoking: Differences in definitions and prevalence estimates--NHIS and NSDUH, 2008. Journal of environmental and public health, 2012(Article ID 918368), . doi:10.1155/2012/918368
Cita Chicago Style (17a ed.)Ryan, Heather, Joe Gfroerer, y Angela Trosclair. "Adult Current Smoking: Differences in Definitions and Prevalence Estimates--NHIS and NSDUH, 2008." Journal of Environmental and Public Health 2012, no. Article ID 918368 (2012). https://doi.org/10.1155/2012/918368.
Cita MLA (9a ed.)Ryan, Heather, et al. "Adult Current Smoking: Differences in Definitions and Prevalence Estimates--NHIS and NSDUH, 2008." Journal of Environmental and Public Health, vol. 2012, no. Article ID 918368, 2012, https://doi.org/10.1155/2012/918368.