APA (7th ed.) Citation

SR, S., KL, K., & SD, P. (2008). Challenges in using opioids to treat pain in persons with substance use disorders. Addiction science & clinical practice, 4(2), 4. https://doi.org/10.1151/ascp08424

Chicago Style (17th ed.) Citation

SR, Savage, Kirsh KL, and Passik SD. "Challenges in Using Opioids to Treat Pain in Persons with Substance Use Disorders." Addiction Science & Clinical Practice 4, no. 2 (2008): 4. https://doi.org/10.1151/ascp08424.

MLA (9th ed.) Citation

SR, Savage, et al. "Challenges in Using Opioids to Treat Pain in Persons with Substance Use Disorders." Addiction Science & Clinical Practice, vol. 4, no. 2, 2008, p. 4, https://doi.org/10.1151/ascp08424.