Herman, H., 		Silalahi, D., 		Sinaga, Y., & 		Silaban, G.
2023 Aug 28.  An Analysis of Students’ Difficulties in Learning TOEFL  at Seventh Semester of Universitas HKBP Nommensen Pematangsiantar. Ideas: Jurnal Pendidikan, Sosial, dan Budaya. [Online] 9:3