Da’i, Mohamad, and Vesti Dwi Cahyaningrum. “The Effect of Self Efficacy and Social Support on Achievement Motivation of UNUGIRI Rugby Athletes”. Nusantara of Research : Jurnal Hasil-hasil Penelitian Universitas Nusantara PGRI Kediri 10, no. 1 (January 20, 2023): 1–11. Accessed December 22, 2024. https://ojs.unpkediri.ac.id/index.php/efektor/article/view/19295.