“EFEKTIVITAS PERMAINAN PUZZLE TERHADAP UPAYA PENINGKATAN KOGNITIF PADA LANSIA: Puzzle Game Effectiveness on Cognitive Enhancement Efforts in the Elderly”. Jurnal Penelitian Sekolah Tinggi Ilmu Kesehatan Nahdlatul Ulama Tuban 5, no. 1 (July 3, 2023). Accessed February 23, 2026. https://ejournal.iiknutuban.ac.id/index.php/jp/article/view/206.