APA

United States, . (2018). Safe and responsible use of opioids for chronic pain: a patient information guide. [Washington, D.C.]: U.S. Department of Veterans Affairs, Veterans Health Administration, PBM Academic Detailing Service.

Chicago

United States, . 2018. Safe and responsible use of opioids for chronic pain: a patient information guide. [Washington, D.C.]: U.S. Department of Veterans Affairs, Veterans Health Administration, PBM Academic Detailing Service.

Harvard

United States, . (2018). Safe and responsible use of opioids for chronic pain: a patient information guide. [Washington, D.C.]: U.S. Department of Veterans Affairs, Veterans Health Administration, PBM Academic Detailing Service.

MLA

United States, . Safe and responsible use of opioids for chronic pain: a patient information guide. [Washington, D.C.]: U.S. Department of Veterans Affairs, Veterans Health Administration, PBM Academic Detailing Service. 2018.