Philippines. National Statistics Office. (1990). 1990 census of population and housing: Population by city, municipality, and barangay. NSO.
芝加哥风格引文Philippines. National Statistics Office. 1990 Census of Population and Housing: Population by City, Municipality, and Barangay. Manila: NSO, 1990.
MLA引文Philippines. National Statistics Office. 1990 Census of Population and Housing: Population by City, Municipality, and Barangay. NSO, 1990.
警告：这些引文格式不一定是100％准确.