The casket of the Unknown Serviceman of the Vietnam Era rests on a bier at the Tomb of the Unknowns at the conclusion of the burial service at Arlington National Cemetery. The Vietnam Unknown will be interred between the Unknowns of the Korean War and World War II

Chicago citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994. The casket of the Unknown Serviceman of the Vietnam Era rests on a bier at the Tomb of the Unknowns at the conclusion of the burial service at Arlington National Cemetery. The Vietnam Unknown will be interred between the Unknowns of the Korean War and World War II. 1984-05-28. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6385831. (Accessed October 19, 2018.)
APA citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994, (1984-05-28) The casket of the Unknown Serviceman of the Vietnam Era rests on a bier at the Tomb of the Unknowns at the conclusion of the burial service at Arlington National Cemetery. The Vietnam Unknown will be interred between the Unknowns of the Korean War and World War II. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6385831
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/6385831>.
Note: These citations are programmatically generated and may be incomplete.