APA citiranje

Kristjansson, A. L., & Sigfusdottir, I. D. (2015). E-cigarette use and relations to tobacco and alcohol use among adolescents. BMC Med.

Citação norma Chicago

Kristjansson, Alfgeir L., and Inga Dora Sigfusdottir. "E-cigarette Use and Relations to Tobacco and Alcohol Use Among Adolescents." BMC Med 2015.

MLA citiranje

Kristjansson, Alfgeir L., and Inga Dora Sigfusdottir. "E-cigarette Use and Relations to Tobacco and Alcohol Use Among Adolescents." BMC Med 2015.