Thirkettle, G. L. (1968). Wheldon's business stastistics and statistical method (6th ed.). ELBS.
शिकागो स्टाइल उद्धरणThirkettle, G. L. Wheldon's Business Stastistics and Statistical Method. 6th ed. ELBS, 1968.
एमएलए उद्धरणThirkettle, G. L. Wheldon's Business Stastistics and Statistical Method. 6th ed. ELBS, 1968.
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