Darmanto, D., P. . Akhmad, B. . Pratomo Sibuea, and M. . Nurdianita. “Web-Based Information System for the Professional Certification Institute P-1 at Politeknik Negeri Ketapang”. Applied Information Technology and Computer Science (AICOMS), vol. 1, no. 1, Dec. 2022, pp. 25-33, doi:10.58466/aicoms.v1i2.1233.