Febrina, Wetri, and Widya Fitriana. “Exponential Weight Moving Average (EWMA) Control Chart for Quality Control of Crude Palm Oil Product”. International Journal of Management and Business Applied 1, no. 1 (March 31, 2022): 19–27. Accessed July 4, 2025. https://journal.adpebi.com/index.php/IJMBA/article/view/93.