Smith, P. H., McKee, S. A., Giovino, G. A., Mazure, C. M., & Rose, J. S. (2014). What is the evidence for hardening in the cigarette smoking population? Trends in nicotine dependence in the U.S., 2002-2012. Drug and alcohol dependence, 142, 333-340.
Chicago Style (17th ed.) CitationSmith, Philip H., Sherry A. McKee, Gary A. Giovino, Carolyn M. Mazure, and Jennifer S. Rose. "What Is the Evidence for Hardening in the Cigarette Smoking Population? Trends in Nicotine Dependence in the U.S., 2002-2012." Drug and Alcohol Dependence 142 (2014): 333-340.
MLA (9th ed.) CitationSmith, Philip H., et al. "What Is the Evidence for Hardening in the Cigarette Smoking Population? Trends in Nicotine Dependence in the U.S., 2002-2012." Drug and Alcohol Dependence, vol. 142, 2014, pp. 333-340.