Tercan , T., and G. Yeshenkulova. “Investigation of All-Inclusive System in Hotel Enterprises in Terms of Waste”. ECONOMIC Series of the Bulletin of the L N Gumilyov ENU, no. 3 (January 25, 2023): 212–224. Accessed May 8, 2024. https://bulecon.enu.kz/index.php/main/article/view/342.