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APA Citation
Ray, M. N., Allison, J. J., Coley, H. L., Williams, J. H., Kohler, C., Gilbert, G. H., Richman, J. S., Kiefe, C. I., Sadasivam, R. S., Houston, T. K., & , (n.d.). variations in tobacco control in National Dental PBRN practices: the role of patient and practice factors. Special care in dentistry, 33, 286–293. http://access.bl.uk/ark:/81055/vdc_100044883342.0x000001