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শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিebrary, Inc, David Ben-Chaim, Yaffa Keret, এবং Bat-Sheva Ilany. Ratio and Proportion: Research and Teaching in Mathematics Teachers' Education (pre- and In-service Mathematics Teachers of Elementary and Middle School Classes). Rotterdam: Sense Publishers, 2012.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিebrary, Inc, et al. Ratio and Proportion: Research and Teaching in Mathematics Teachers' Education (pre- and In-service Mathematics Teachers of Elementary and Middle School Classes). Sense Publishers, 2012.
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