Bahri, Samsul, Disna Anum Siregar, Ulian Barus, Nurjannah Nurjannah, and Saiful Bahri. 2023. “The Influence of the Online Learning System on the Professionalism of Lecturer Performance at University”. AL-ISHLAH: Jurnal Pendidikan 15 (3):4090-4103. https://doi.org/10.35445/alishlah.v15i3.3986.