Annisya, Annisya, Retno Sayekti, and Abdi Mubarak Syam. “PERSEPSI PUSTAKAWAN UNIVERSITAS SUMATERA UTARA TERHADAP PROGRAM SERTIFIKASI UJI KOMPETENSI”. Triwikrama: Jurnal Ilmu Sosial 2, no. 2 (November 28, 2023): 83–93. Accessed August 3, 2025. https://ejournal.warunayama.org/index.php/triwikrama/article/view/869.