Nicholas, S., Bauer-Staeb, C. M. M., Ford, J. A., Abbafati, C., Abdalla, M. A., Abdelkader, A., . . . Newton, J. N. (2025). Changing life expectancy in European countries 1990–2021: A subanalysis of causes and risk factors from the Global Burden of Disease Study 2021.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Nicholas, Steel, et al. Changing Life Expectancy in European Countries 1990–2021: A Subanalysis of Causes and Risk Factors from the Global Burden of Disease Study 2021. 2025.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Nicholas, Steel, et al. Changing Life Expectancy in European Countries 1990–2021: A Subanalysis of Causes and Risk Factors from the Global Burden of Disease Study 2021. 2025.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.