widaningrum, sri, et al. “Integration the 6th Category Business Excellence Framework, the 8th Clause ISO 9001:2015 and the 6th Category KPKU Indonesia Framework ”. International Journal of Integrated Engineering, vol. 12, no. 7, Dec. 2020, pp. 291-00, https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/6911.