Two Marine instructors explain the function of a 155 mm self-propelled howitzer to a group of young visitors

Chicago citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994-. Two Marine instructors explain the function of a 155 mm self-propelled howitzer to a group of young visitors. 1986-07-13. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6415970. (Accessed July 20, 2018.)
APA citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994-, (1986-07-13) Two Marine instructors explain the function of a 155 mm self-propelled howitzer to a group of young visitors. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6415970
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/6415970>.
Note: These citations are programmatically generated and may be incomplete.