Karbaev N.K. Карбаев Н.К., and Nursultan I. Нурсултан И. “Issues of Improving the Quality Management System Based on the Development of the Consumer Valuation Model”. Рroblems of engineering and professional education 46, no. 1 (December 19, 2022): 41. Accessed November 21, 2024. https://bulprengpe.enu.kz/index.php/main/article/view/155.