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توثيق أسلوب شيكاغو (الطبعة السابعة عشر)(11257335), Sudabeh Alatab, et al. The Global, Regional, and National Burden of Inflammatory Bowel Disease in 195 Countries and Territories, 1990–2017: A Systematic Analysis for the Global Burden of Disease Study 2017. 2020.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)(11257335), Sudabeh Alatab, et al. The Global, Regional, and National Burden of Inflammatory Bowel Disease in 195 Countries and Territories, 1990–2017: A Systematic Analysis for the Global Burden of Disease Study 2017. 2020.