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توثيق أسلوب شيكاغو (الطبعة السابعة عشر)(9715361), Natalie C Galles, et al. Measuring Routine Childhood Vaccination Coverage in 204 Countries and Territories, 1980–2019: A Systematic Analysis for the Global Burden of Disease Study 2020, Release 1. 2021.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)(9715361), Natalie C Galles, et al. Measuring Routine Childhood Vaccination Coverage in 204 Countries and Territories, 1980–2019: A Systematic Analysis for the Global Burden of Disease Study 2020, Release 1. 2021.