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توثيق أسلوب شيكاغو (الطبعة السابعة عشر)(18015919), Jaimie D Steinmetz, et al. Causes of Blindness and Vision Impairment in 2020 and Trends over 30 Years, and Prevalence of Avoidable Blindness in Relation to VISION 2020: The Right to Sight: An Analysis for the Global Burden of Disease Study. 2020.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)(18015919), Jaimie D Steinmetz, et al. Causes of Blindness and Vision Impairment in 2020 and Trends over 30 Years, and Prevalence of Avoidable Blindness in Relation to VISION 2020: The Right to Sight: An Analysis for the Global Burden of Disease Study. 2020.