U.S. Army SPEC. Richard Dietz, Alpha Company, 7th Battalion, 158th Aviation Regiment, mans an M2 .50 caliber machine gun mounted on a CH-47 Chinook helicopter on Jan. 26, 2007, in Afghanistan during Operation Enduring Freedom. (U.S. Army photo by STAFF SGT. Michael Casteel) (Released)

Chicago citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994. U.S. Army SPEC. Richard Dietz, Alpha Company, 7th Battalion, 158th Aviation Regiment, mans an M2 .50 caliber machine gun mounted on a CH-47 Chinook helicopter on Jan. 26, 2007, in Afghanistan during Operation Enduring Freedom. (U.S. Army photo by STAFF SGT. Michael Casteel) (Released). 2007-01-26. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6680017. (Accessed September 21, 2018.)
APA citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994, (2007-01-26) U.S. Army SPEC. Richard Dietz, Alpha Company, 7th Battalion, 158th Aviation Regiment, mans an M2 .50 caliber machine gun mounted on a CH-47 Chinook helicopter on Jan. 26, 2007, in Afghanistan during Operation Enduring Freedom. (U.S. Army photo by STAFF SGT. Michael Casteel) (Released). Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6680017
MLA citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/6680017>.
Note: These citations are programmatically generated and may be incomplete.