YULIARTO, Hari. Analisis indeks Aiken untuk mengukur validitas isi instrumen komitmen tugas bermain sepakbola. Jurnal Pendidikan Jasmani Indonesia, [S. l.], v. 17, n. 1, p. 19–23, 2021. DOI: 10.21831/jpji.v17i1.38777. Disponível em: https://journal.uny.ac.id/index.php/jpji/article/view/38777. Acesso em: 5 jun. 2025.