APA-viite (7. p.)
Johnson, K. W., Shamblen, S. R., Courser, M. W., Young, L., Abadi, M. H., & Browne, T. (2013). Drug use and treatment success among gang and non-gang members in El Salvador: A prospective cohort study. Substance Abuse Treatment, Prevention and Policy. https://doi.org/10.1186/1747-597X-8-20
Chicago-viite (17. p.)
Johnson, Knowlton W., Stephen R. Shamblen, Matthew W. Courser, Linda Young, Melissa H. Abadi, ja Thom Browne. "Drug Use and Treatment Success Among Gang and Non-gang Members in El Salvador: A Prospective Cohort Study." Substance Abuse Treatment, Prevention and Policy 2013. https://doi.org/10.1186/1747-597X-8-20.
MLA-viite (9. p.)
Johnson, Knowlton W., et al. "Drug Use and Treatment Success Among Gang and Non-gang Members in El Salvador: A Prospective Cohort Study." Substance Abuse Treatment, Prevention and Policy, 2013, https://doi.org/10.1186/1747-597X-8-20.
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