Mayangsari, Baginda Simaibang, and Mulyadi. “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, no. 1 (August 28, 2021): 2521–2528. Accessed December 27, 2024. http://jptam.org/index.php/jptam/article/view/1701.