Não informado. (1918). Monthly Labor Review. Department of Labour, Bureau of Labor Statistics.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Monthly Labor Review. Washington: Department of Labour, Bureau of Labor Statistics, 1918.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Monthly Labor Review. Department of Labour, Bureau of Labor Statistics, 1918.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.