A close-up view of the turret of an M163 Vulcan self-propelled anti-aircraft gun, which consists of an M168 Vulcan 20 mm cannon with radar fire control mounted on a modified M113 armored personnel carrier. This 24th Infantry Division (Mechanized) M163 is participating in an exercise at the National Training Center

Chicago citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994. A close-up view of the turret of an M163 Vulcan self-propelled anti-aircraft gun, which consists of an M168 Vulcan 20 mm cannon with radar fire control mounted on a modified M113 armored personnel carrier. This 24th Infantry Division (Mechanized) M163 is participating in an exercise at the National Training Center. 1988-11-01. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6446215. (Accessed December 12, 2018.)
APA citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994, (1988-11-01) A close-up view of the turret of an M163 Vulcan self-propelled anti-aircraft gun, which consists of an M168 Vulcan 20 mm cannon with radar fire control mounted on a modified M113 armored personnel carrier. This 24th Infantry Division (Mechanized) M163 is participating in an exercise at the National Training Center. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6446215
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/6446215>.
Note: These citations are programmatically generated and may be incomplete.