Melvin S. Cayanan, Jimwell G. Flores, Adrian G. Laxamana, Joshua G. Mallari, Nathaniel D. San Juan, Michael Angelo T. Torres, Mariane P. Nunag, Carl Jason A. Coronel, and Mike Diether B. Galvez. “Quick Response Code System Integrated ID for Construction Firms: Approach to the New Normal”. International Journal of Progressive Research in Science and Engineering 4, no. 01 (January 14, 2023): 64–73. Accessed May 4, 2024. https://journal.ijprse.com/index.php/ijprse/article/view/778.