Mayangsari, Simaibang, B. ., & Mulyadi. (2021). The Correlations Among Self-Confidence, Learning Motivation, and Speaking Ability of The Eleventh Grade Students Of State Vocational High School 1 of Talang Ubi Pali. Jurnal Pendidikan Tambusai, 5(1), 2521–2528. https://doi.org/10.31004/jptam.v5i1.1701