Castro, S. H. (1993). Study on labor Force concepts: Operational definitions and measurementsSonia H. Castro and Manuel Laopao. Bureau of Labor and Employment Statistics, DOLE/ILO-ARTEP.
Chicago Style (17. basım) AtıfCastro, Sonia H. Study on Labor Force Concepts: Operational Definitions and MeasurementsSonia H. Castro and Manuel Laopao. Manila: Bureau of Labor and Employment Statistics, DOLE/ILO-ARTEP, 1993.
MLA (9th ed.) AtıfCastro, Sonia H. Study on Labor Force Concepts: Operational Definitions and MeasurementsSonia H. Castro and Manuel Laopao. Bureau of Labor and Employment Statistics, DOLE/ILO-ARTEP, 1993.
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