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.
Lua i Stíl Chicago (17ú heag.)Philippines. 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.
Lua MLA (9ú heag.)Philippines. 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.