Regan, A., & Berkowitz, J. (2011). Smokers who are also using smokeless tobacco products in the US: A national assessment of characteristics, behaviours and beliefs of 'dual users'. BMJ Publishing Group.
Chicago Style (17th ed.) CitationRegan, Annette, and J. Berkowitz. Smokers Who Are Also Using Smokeless Tobacco Products in the US: A National Assessment of Characteristics, Behaviours and Beliefs of 'Dual Users'. BMJ Publishing Group, 2011.
MLA (9th ed.) CitationRegan, Annette, and J. Berkowitz. Smokers Who Are Also Using Smokeless Tobacco Products in the US: A National Assessment of Characteristics, Behaviours and Beliefs of 'Dual Users'. BMJ Publishing Group, 2011.
Warning: These citations may not always be 100% accurate.