Pacific Science Congress (8th : 1953 : Quezon City). (1953). Circular of information. National Research Council of the Philippines.
Chicago-referens (17:e uppl.)Pacific Science Congress (8th : 1953 : Quezon City). Circular of Information. Quezon City: National Research Council of the Philippines, 1953.
MLA-referens (9:e uppl.)Pacific Science Congress (8th : 1953 : Quezon City). Circular of Information. National Research Council of the Philippines, 1953.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.