GAOL, Jonner Lumban; 						SINAGA, Sarman.
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Available at: &lt;<a href="https://jurnal.darmaagung.ac.id/index.php/pkmmajuuda/article/view/701" target="_new">https://jurnal.darmaagung.ac.id/index.php/pkmmajuuda/article/view/701</a>&gt;. Date accessed: 21 nov. 2024.