Sembiring, Lina, et al. “Seminar TOEFL Upskill Mahasiswa Universitas Dehasen Bengkulu”. Jurnal Kewirausahaan Dan Bisnis, vol. 3, no. 2, Aug. 2021, pp. 95-98, https://jurnalunived.com/index.php/JKB/article/view/297.