HEALEY JOSEPH F. (1999). STATISTICS: A TOOL FOR SOCIAL RESEARCH (5TH.). INTERNATIONAL THOMSON BUSINESS PRESS.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHEALEY JOSEPH F. STATISTICS: A TOOL FOR SOCIAL RESEARCH. 5TH. BOSTON: INTERNATIONAL THOMSON BUSINESS PRESS, 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHEALEY JOSEPH F. STATISTICS: A TOOL FOR SOCIAL RESEARCH. 5TH. INTERNATIONAL THOMSON BUSINESS PRESS, 1999.
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