APA

Polk D. E., Wang X., Feingold E., Shaffer J. R., Weeks D. E., Weyant R. J., Crout R. J., McNeil D. W. & Marazita M. L. (20130317). Effects of smoking and genotype on the PSR index of periodontal disease in adults aged 18-49. : International journal of environmental research and public health.

Chicago

Polk Deborah E, Wang Xiaojing, Feingold Eleanor, Shaffer John R, Weeks Daniel E, Weyant Robert J, Crout Richard J, McNeil Daniel W and Marazita Mary L. 20130317. Effects of smoking and genotype on the PSR index of periodontal disease in adults aged 18-49. : International journal of environmental research and public health.

Harvard

Polk D. E., Wang X., Feingold E., Shaffer J. R., Weeks D. E., Weyant R. J., Crout R. J., McNeil D. W. and Marazita M. L. (20130317). Effects of smoking and genotype on the PSR index of periodontal disease in adults aged 18-49. : International journal of environmental research and public health.

MLA

Polk Deborah E, Wang Xiaojing, Feingold Eleanor, Shaffer John R, Weeks Daniel E, Weyant Robert J, Crout Richard J, McNeil Daniel W and Marazita Mary L. Effects of smoking and genotype on the PSR index of periodontal disease in adults aged 18-49. : International journal of environmental research and public health. 20130317.