Robert G D. Steel. (1960). Principles and procedures of statistics. New York: McGraw-Hill.
शिकागो स्टाइल उद्धरणRobert G D. Steel. Principles and Procedures of Statistics. New York: McGraw-Hill, 1960.
एमएलए उद्धरणRobert G D. Steel. Principles and Procedures of Statistics. New York: McGraw-Hill, 1960.
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