Philippines. Department of Labor and Employment. (1989). Workers protection and welfare handbook. DOLE.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPhilippines. Department of Labor and Employment. Workers Protection and Welfare Handbook. Manila: DOLE, 1989.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPhilippines. Department of Labor and Employment. Workers Protection and Welfare Handbook. DOLE, 1989.
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