APA (7th ed.) Citation

Castro, S. H. (1993). Study on labor force concepts: Operational definitions and measurements. Bureau of Labor and Employment Statistics.

Chicago Style (17th ed.) Citation

Castro, Sonia H. Study on Labor Force Concepts: Operational Definitions and Measurements. Manila: Bureau of Labor and Employment Statistics, 1993.

MLA (9th ed.) Citation

Castro, Sonia H. Study on Labor Force Concepts: Operational Definitions and Measurements. Bureau of Labor and Employment Statistics, 1993.