Philippines . Department of Labor. Labor Statistics Service. (1977). Selected labor indicators. DOL.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPhilippines . Department of Labor. Labor Statistics Service. Selected Labor Indicators. Manila: DOL, 1977.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPhilippines . Department of Labor. Labor Statistics Service. Selected Labor Indicators. DOL, 1977.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.