Philippines (Republic). Bureau of the Census and Statistics. (1966). Economic census of the Philippines, 1961: Summary statistics for all economic fields, by size of establishment, by major industry group, for the Philippines, 1961. [s.n.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Philippines (Republic). Bureau of the Census and Statistics. Economic Census of the Philippines, 1961: Summary Statistics for All Economic Fields, by Size of Establishment, by Major Industry Group, for the Philippines, 1961. Manila: [s.n, 1966.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Philippines (Republic). Bureau of the Census and Statistics. Economic Census of the Philippines, 1961: Summary Statistics for All Economic Fields, by Size of Establishment, by Major Industry Group, for the Philippines, 1961. [s.n, 1966.