Philippines. Dept. of National Defense. (1974). Office of civil defense. The Department.
Chicago-referens (17:e uppl.)Philippines. Dept. of National Defense. Office of Civil Defense. Quezon City: The Department, 1974.
MLA-referens (9:e uppl.)Philippines. Dept. of National Defense. Office of Civil Defense. The Department, 1974.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.