U.S. and Peruvian navy ships steam in formation during Unitas XXXI, a combined exercise involving the naval forces of the United States and nine South American nations. The ships are, from left: the Peruvian frigate BAP MANUEL VILLAVICENCIO (FM-52), the destroyer USS HAYLER (DD-997), the Peruvian frigate BAP MONTERO (FM-53), the guided missile cruiser USS JOSEPHUS DANIELS (CG-27), the Peruvian frigate BAP MARIATEGUI (FM-54) and the guided missile frigate USS STEPHEN W. GROVES (FFG-29).

Chicago citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994. U.S. and Peruvian navy ships steam in formation during Unitas XXXI, a combined exercise involving the naval forces of the United States and nine South American nations. The ships are, from left: the Peruvian frigate BAP MANUEL VILLAVICENCIO (FM-52), the destroyer USS HAYLER (DD-997), the Peruvian frigate BAP MONTERO (FM-53), the guided missile cruiser USS JOSEPHUS DANIELS (CG-27), the Peruvian frigate BAP MARIATEGUI (FM-54) and the guided missile frigate USS STEPHEN W. GROVES (FFG-29).. 1990-07-01. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6475081. (Accessed September 24, 2018.)
APA citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994, (1990-07-01) U.S. and Peruvian navy ships steam in formation during Unitas XXXI, a combined exercise involving the naval forces of the United States and nine South American nations. The ships are, from left: the Peruvian frigate BAP MANUEL VILLAVICENCIO (FM-52), the destroyer USS HAYLER (DD-997), the Peruvian frigate BAP MONTERO (FM-53), the guided missile cruiser USS JOSEPHUS DANIELS (CG-27), the Peruvian frigate BAP MARIATEGUI (FM-54) and the guided missile frigate USS STEPHEN W. GROVES (FFG-29).. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6475081
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/6475081>.
Note: These citations are programmatically generated and may be incomplete.