Off-duty US military personnel visit Del Morro Castle, a national historic site maintained by the US Department of the Interior, National Park Service

Chicago citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994. Off-duty US military personnel visit Del Morro Castle, a national historic site maintained by the US Department of the Interior, National Park Service. 1986-02-01. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6432273. (Accessed October 16, 2018.)
APA citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994, (1986-02-01) Off-duty US military personnel visit Del Morro Castle, a national historic site maintained by the US Department of the Interior, National Park Service. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6432273
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/6432273>.
Note: These citations are programmatically generated and may be incomplete.