R. Hidayat, H. Setyawati, and S. B. Mukarromah, “Preliminary psychometric evidence for PLAYfun and PLAYself among Indonesian elementary school students: Item validity and internal consistency”, Phys. Educ. Learn. Teach. Assess., vol. 1, no. 1, pp. 13–24, Sep. 2026, Accessed: Sep. 30, 2026. Available: https://ejournals.pjki.or.id/index.php/pelta/article/view/17