Docherty, G., McNeill, A., Gartner, C., & Szatkowski, L. (2014). Did hardening occur among smokers in England from 2000 to 2010? Wiley.
Chicago Style (17th ed.) CitationDocherty, Graeme, Ann McNeill, Coral Gartner, and Lisa Szatkowski. Did Hardening Occur Among Smokers in England from 2000 to 2010? Wiley, 2014.
MLA (9th ed.) CitationDocherty, Graeme, et al. Did Hardening Occur Among Smokers in England from 2000 to 2010? Wiley, 2014.
Warning: These citations may not always be 100% accurate.