Hanif, Nak Mas Ashim, and Januar Abdilah Santoso. “The Effect of Personal Challenge-Based Gamification on Physical Fitness Among Elementary School Students: A Quasi-Experimental Study: Studi Kuasi-Eksperimental”. Jurnal Porkes, vol. 9, no. 2, May 2026, pp. 710–721, doi:10.29408/porkes.v9i2.31360.