Qoirul Idzam, Ficki, Puspodari, and Weda. “The Relationship With Self-Efficacy and Motivation Athletes Achievement in Football School (SSB) Posba Basongan”. NUSANTARA SPORTA: Jurnal Pendidikan dan Ilmu Keolahragaan 1, no. 03 (August 11, 2023): 110–118. Accessed September 19, 2024. https://jurnal.nusantarasporta.com/index.php/ns/article/view/55.