Purba, Desmalia, 		Panjaitan, Jelita, DAN 		Pardede, Dewi.
" PROBLEMS FOUND ON THE TOEFL TEST QUESTIONS BY THE FIFTH SEMESTER PHYSICS STUDENTS OF DARMA AGUNG UNIVERSITY" <em>JURNAL DARMA AGUNG</em> [Online], Volume 32 Nomor 2 (26 April 2024)