Bluestein, Meagan, Steven Kelder, Cheryl L. Perry, and Adriana Pérez. 2018. “Exploring Associations Between the Use of Alcohol and Marijuana With E-Cigarette Use in a U.S.A. Nationally Representative Sample of Young Adults”. International Journal of Health Sciences 13 (1). https://pub.qu.edu.sa/index.php/journal/article/view/3580.