Substance Abuse and Mental Health Services Administration (SAMSHA). Hallucinogens. http://www.samhsa.gov/atod/hallucinogens. Updated 7/12/2106. Accessed 8/2016.
Schatzberg A, Nemeroff C. Essentials Of Clinical Psychopharmacology, 3rd ed. Washington, DC: American Psychiatric Pub.; 2013.