Philippines. National Census and Statistics Office. (1977). Labor force projections by age and sex for the Philippines, by region and province: 1970-2000. National Census and Statistics Office, National Economic and Development Authority.
Chicago (17e ed.) BronvermeldingPhilippines. National Census and Statistics Office. Labor Force Projections by Age and Sex for the Philippines, by Region and Province: 1970-2000. Manila: National Census and Statistics Office, National Economic and Development Authority, 1977.
MLA (9e ed.) BronvermeldingPhilippines. National Census and Statistics Office. Labor Force Projections by Age and Sex for the Philippines, by Region and Province: 1970-2000. National Census and Statistics Office, National Economic and Development Authority, 1977.