Arya Eka Saputra, Muhammad Romdony, and Abdul Syahid. 2025. “Exploring The Impact Of Textbook On Speaking Proficiency In Business Communication”. PESHUM : Jurnal Pendidikan, Sosial Dan Humaniora 4 (2):1568-74. https://doi.org/10.56799/peshum.v4i2.7407.