Philippines. National Census and Statistics Office. (1982). Philippines 1980 : population, land area, and density: 1970, 1975, and 1980. NCSO.
Chicagoスタイル(17版)引用形式Philippines. National Census and Statistics Office. Philippines 1980 : Population, Land Area, and Density: 1970, 1975, and 1980. Manila: NCSO, 1982.
MLA(9版)引用形式Philippines. National Census and Statistics Office. Philippines 1980 : Population, Land Area, and Density: 1970, 1975, and 1980. NCSO, 1982.
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