Rachmi, Nevrita, Abdulhajar E, Zaitun. Increasing Student Motivation by Using Problem-Based Learning of Maritime Contextual Problems in Lingga Regency in Mathematics Leaning at SMA Negeri 1 Lingga. pembahas [Internet]. 2025 Sep. 29 [cited 2025 Oct. 15];4(5):1113-22. Available from: http://pembahas.dialeks.id/index.php/jp/article/view/889