Hill McGraw. (2007). Encyclopedia of Science & Technology (20 INDEX) ( sách photo) (Tái bản lần thứ 10.). American: MC Graw Hill.
শিকাগো স্টাইলে সাইটেশনHill McGraw. Encyclopedia of Science & Technology (20 INDEX) ( Sách Photo). Tái bản lần thứ 10. American: MC Graw Hill, 2007.
এমএলএ সাইটেশনHill McGraw. Encyclopedia of Science & Technology (20 INDEX) ( Sách Photo). Tái bản lần thứ 10. American: MC Graw Hill, 2007.
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