Age-related changes in reasons for using alcohol and marijuana from ages 18 to 30 in a national sample

Patrick, Megan E; Schulenberg, John E; O’Malley, Patrick M; Maggs, Jennifer L; Kloska, Deborah Denise; Johnston, Lloyd D; Bachman, Jerald G. (2011). Age-related changes in reasons for using alcohol and marijuana from ages 18 to 30 in a national sample. Psychology of Addictive Behaviors. 25(2), 330-339.