Зиявитдинов K. “Quality of Services As a Result of the Sophistication of the Catering Team”. Иқтисодий ўзгаришларнинг минтақавий муаммолари ва ривожланиш истиқболлари, vol. 1, no. 1, Sept. 2021, pp. 6-12, https://inlibrary.uz/index.php/problems_of_economic_change/article/view/3684.