Freedman David, Pisani Robert, & Purves Roger. (1997). Statistics, Third Edition (Tái bản lần thứ 3.). American: McGraw-Hill.
শিকাগো স্টাইলে সাইটেশনFreedman David, Pisani Robert, এবং Purves Roger. Statistics, Third Edition. Tái bản lần thứ 3. American: McGraw-Hill, 1997.
এমএলএ সাইটেশনFreedman David, Pisani Robert, এবং Purves Roger. Statistics, Third Edition. Tái bản lần thứ 3. American: McGraw-Hill, 1997.
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