Philippines. Bureau of Working Conditions. Occupational Safety and Health Division. (1990). Primer on the occupational safety and health standards: As amended. Health and Safety, Occupational Safety and Health Division, Bureau of Working Conditions, Dept. of Labor and Employment.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPhilippines. Bureau of Working Conditions. Occupational Safety and Health Division. Primer on the Occupational Safety and Health Standards: As Amended. Manila: Health and Safety, Occupational Safety and Health Division, Bureau of Working Conditions, Dept. of Labor and Employment, 1990.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPhilippines. Bureau of Working Conditions. Occupational Safety and Health Division. Primer on the Occupational Safety and Health Standards: As Amended. Health and Safety, Occupational Safety and Health Division, Bureau of Working Conditions, Dept. of Labor and Employment, 1990.