The 44-gun sail frigate USS CONSTITUTION fires two 24-pound long guns (fitted for 40 mm rounds) in a 21-gun salute to the nation off Castle Island Park. After the salute the ship will be returned to its berth facing the opposite way to help it weather evenly and preserve the wood

Chicago citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994-. The 44-gun sail frigate USS CONSTITUTION fires two 24-pound long guns (fitted for 40 mm rounds) in a 21-gun salute to the nation off Castle Island Park. After the salute the ship will be returned to its berth facing the opposite way to help it weather evenly and preserve the wood. 1987-07-04. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6424204. (Accessed June 23, 2018.)
APA citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994-, (1987-07-04) The 44-gun sail frigate USS CONSTITUTION fires two 24-pound long guns (fitted for 40 mm rounds) in a 21-gun salute to the nation off Castle Island Park. After the salute the ship will be returned to its berth facing the opposite way to help it weather evenly and preserve the wood. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6424204
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/6424204>.
Note: These citations are programmatically generated and may be incomplete.