Da’i, M. and Cahyaningrum, V. D. (2023) “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(1), pp. 1-11. doi: 10.29407/nor.v10i1.19295.