Cita APA

Churchill, V., Nyman, A. L., Weaver, S. R., Yang, B., Huang, J., & Popova, L. (2021). Perceived risk of electronic cigarettes compared with combustible cigarettes: Direct versus indirect questioning. Tob Control.

Citación estilo Chicago

Churchill, Victoria, Amy L. Nyman, Scott R. Weaver, Bo Yang, Jidong Huang, y Lucy Popova. "Perceived Risk of Electronic Cigarettes Compared With Combustible Cigarettes: Direct Versus Indirect Questioning." Tob Control 2021.

Cita MLA

Churchill, Victoria, et al. "Perceived Risk of Electronic Cigarettes Compared With Combustible Cigarettes: Direct Versus Indirect Questioning." Tob Control 2021.