APA ציטוט

Williams, R. S., Derrick, J., Liebman, A. K., LaFleur, K., & Ribisl, K. M. (2017). Content analysis of age verification, purchase and delivery methods of internet e-cigarette vendors, 2013 and 2014. Tob Control.

Citação norma Chicago

Williams, Rebecca S., Jason Derrick, Aliza Kate Liebman, Kevin LaFleur, and Kurt M. Ribisl. "Content Analysis of Age Verification, Purchase and Delivery Methods of Internet E-cigarette Vendors, 2013 and 2014." Tob Control 2017.

ציטוט MLA

Williams, Rebecca S., et al. "Content Analysis of Age Verification, Purchase and Delivery Methods of Internet E-cigarette Vendors, 2013 and 2014." Tob Control 2017.