Novendra, Alan, Mufrida Meri, and Hary Fandeli. “PRODUCTIVITY ANALYSIS USING AMERICAN PRODUCTIVITY CENTER (APC) MODEL”. UNES Journal of Scientech Research 7, no. 1 (June 30, 2022): 023-034. Accessed October 21, 2025. https://ojs.ekasakti.org/index.php/UJSR/article/view/302.