Herman, Herman, Dumaris E Silalahi, Yanti Kristina Sinaga, & Gabriella Clarisa Silaban.
" An Analysis of Students’ Difficulties in Learning TOEFL  at Seventh Semester of Universitas HKBP Nommensen Pematangsiantar." <em>Ideas: Jurnal Pendidikan, Sosial, dan Budaya</em> [Online], 9.3 (2023): 805-812. Web. 15 May. 2026