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  <div class="csl-entry"><div class="csl-left-margin">(1)</div><div class="csl-right-inline">Shinta, P.; Sakur; Heleni, S. Implementing the Problem-Based Learning Model to Improve students’ Mathematical Problem-Solving Ability. <i>JA</i> <b>2024</b>, <i>7</i>, 300-309.</div></div>
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