APA
Preston S. H. e. a., National Bureau of Economic Research, . (2012). Projecting the effect of changes in smoking and obesity on future life expectancy in the United States. Cambridge: NBER.
Chicago
Preston Samuel H et al, National Bureau of Economic Research, . 2012. Projecting the effect of changes in smoking and obesity on future life expectancy in the United States. Cambridge: NBER.
Harvard
Preston S. H. e. a., National Bureau of Economic Research, . (2012). Projecting the effect of changes in smoking and obesity on future life expectancy in the United States. Cambridge: NBER.
MLA
Preston Samuel H et al, National Bureau of Economic Research, . Projecting the effect of changes in smoking and obesity on future life expectancy in the United States. Cambridge: NBER. 2012.