Two US Army UH-60 Black Hawk (Blackhawk) helicopters land during a search and rescue exercise conducted as part of the operation. This operation is a security mission to enforce the United Nations no-fly zone north of the 36 degree parallel from Iraqi air and ground incursion. A four nation coalition of US, Turkey, Great Britain and France has been actively protecting and supplying Kurdish refugees since Desert Storm in 1991.(Exact date unknown)

Chicago citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994. Two US Army UH-60 Black Hawk (Blackhawk) helicopters land during a search and rescue exercise conducted as part of the operation. This operation is a security mission to enforce the United Nations no-fly zone north of the 36 degree parallel from Iraqi air and ground incursion. A four nation coalition of US, Turkey, Great Britain and France has been actively protecting and supplying Kurdish refugees since Desert Storm in 1991.(Exact date unknown). 1995-05-01. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6499013. (Accessed November 15, 2018.)
APA citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994, (1995-05-01) Two US Army UH-60 Black Hawk (Blackhawk) helicopters land during a search and rescue exercise conducted as part of the operation. This operation is a security mission to enforce the United Nations no-fly zone north of the 36 degree parallel from Iraqi air and ground incursion. A four nation coalition of US, Turkey, Great Britain and France has been actively protecting and supplying Kurdish refugees since Desert Storm in 1991.(Exact date unknown). Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6499013
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/6499013>.
Note: These citations are programmatically generated and may be incomplete.