APA (7th ed.) Citation

Thompson, E. N., & Overton, H. (1991). The guns of San Diego: San Diego harbor defenses, 1796-1947 : historic resource study, Cabrillo National Monument. National Park Service.

Chicago Style (17th ed.) Citation

Thompson, Erwin N., and Howard Overton. The Guns of San Diego: San Diego Harbor Defenses, 1796-1947 : Historic Resource Study, Cabrillo National Monument. San Diego, Calif.: National Park Service, 1991.

MLA (9th ed.) Citation

Thompson, Erwin N., and Howard Overton. The Guns of San Diego: San Diego Harbor Defenses, 1796-1947 : Historic Resource Study, Cabrillo National Monument. National Park Service, 1991.