Keyes, K. M., Cerdá, M., Brady, J. E., Havens, J. R., & Galea, S. (2014). Understanding the Rural–Urban Differences in Nonmedical Prescription Opioid Use and Abuse in the United States. American Public Health Association.

Keyes, Katherine M., Magdalena Cerdá, Joanne E. Brady, Jennifer R. Havens, και Sandro Galea. Understanding the Rural–Urban Differences in Nonmedical Prescription Opioid Use and Abuse in the United States. American Public Health Association, 2014.

Keyes, Katherine M., et al. Understanding the Rural–Urban Differences in Nonmedical Prescription Opioid Use and Abuse in the United States. American Public Health Association, 2014.