Rachmi, Nevrita, E. Abdulhajar, and Zaitun. “Increasing Student Motivation by Using Problem-Based Learning of Maritime Contextual Problems in Lingga Regency in Mathematics Leaning at SMA Negeri 1 Lingga”. Jurnal Pembelajaran Bahasa Dan Sastra, vol. 4, no. 5, Sept. 2025, pp. 1113-22, doi:10.55909/jpbs.v4i5.889.