Não informado. (1920). Quarterly Publications of the American Statistical Association. American Statistical Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Quarterly Publications of the American Statistical Association. Boston, Mass: American Statistical Association, 1920.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Quarterly Publications of the American Statistical Association. American Statistical Association, 1920.
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