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 Kelayakan Bahan Ajar Matematika SMP Berbasis Multi Representasi dalam Pembelajaran Berbasis Masalah.
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Available at: &lt;<a href="https://eproceeding.undiksha.ac.id/index.php/senari/article/view/2122" target="_new">https://eproceeding.undiksha.ac.id/index.php/senari/article/view/2122</a>&gt;. Date accessed: 06 mar. 2021.