Cita APA (7th ed.)
Duncan, D., & et al. Perceived neighborhood illicit drug selling, peer illicit drug disapproval and illicit drug use among U.S. high school seniors. https://doi.org/10.1186/1747-597X-9-35
Cita Chicago (17th ed.)
Duncan, D.T, i et al. Perceived Neighborhood Illicit Drug Selling, Peer Illicit Drug Disapproval and Illicit Drug Use Among U.S. High School Seniors. https://doi.org/10.1186/1747-597X-9-35.
Cita MLA (9th ed.)
Duncan, D.T, i et al. Perceived Neighborhood Illicit Drug Selling, Peer Illicit Drug Disapproval and Illicit Drug Use Among U.S. High School Seniors. https://doi.org/10.1186/1747-597X-9-35.
Atenció: Aquestes cites poden no estar 100% correctes.