Yudhistira, Adam Achmad, and Sasminta Christina Yuli Hartati. “Motivasi Siswa Peserta Ekstrakurikuler Softball Di SMP Negeri 29 Surabaya”. Jurnal Pendidikan Tambusai 8, no. 2 (August 1, 2024): 32402–32408. Accessed July 14, 2025. https://jptam.org/index.php/jptam/article/view/18360.