Zulfikar, Z., and M. Mukson. “SURVEY TINGKAT KESEGARAN JASMANI PADA SISWA SEKOLAH DASAR”. Jurnal Olympia, vol. 1, no. 2, Dec. 2019, pp. 33-39, https://journal.binadarma.ac.id/index.php/olympia/article/view/10.33557%2Fjurnalolympia.v1i2.749.