US Air Force (USAF) SENIOR AIRMAN (SRA) Andrea Howard (foreground), Food Service Chef assigned to the 21st Space Wing (SW), Peterson Air Force Base (AFB), Colorado (CO), carefully weighs celery for a beef stew during the Chefs food preparation competition at Vandenberg Air Force Base (AFB) California (CA), during Exercise GUARDIAN CHALLENGE 2002. Guardian Challenge, a four-day space and missile competition, is hosted annually at Vandenberg AFB, CA to test the wartime readiness of Air Force Space Command (AFSPC) professionals

Chicago citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994. US Air Force (USAF) SENIOR AIRMAN (SRA) Andrea Howard (foreground), Food Service Chef assigned to the 21st Space Wing (SW), Peterson Air Force Base (AFB), Colorado (CO), carefully weighs celery for a beef stew during the Chefs food preparation competition at Vandenberg Air Force Base (AFB) California (CA), during Exercise GUARDIAN CHALLENGE 2002. Guardian Challenge, a four-day space and missile competition, is hosted annually at Vandenberg AFB, CA to test the wartime readiness of Air Force Space Command (AFSPC) professionals. 2002-05-08. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6629076. (Accessed November 15, 2018.)
APA citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994, (2002-05-08) US Air Force (USAF) SENIOR AIRMAN (SRA) Andrea Howard (foreground), Food Service Chef assigned to the 21st Space Wing (SW), Peterson Air Force Base (AFB), Colorado (CO), carefully weighs celery for a beef stew during the Chefs food preparation competition at Vandenberg Air Force Base (AFB) California (CA), during Exercise GUARDIAN CHALLENGE 2002. Guardian Challenge, a four-day space and missile competition, is hosted annually at Vandenberg AFB, CA to test the wartime readiness of Air Force Space Command (AFSPC) professionals. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6629076
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/6629076>.
Note: These citations are programmatically generated and may be incomplete.