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Παραπομπή σε μορφή Chicago (17η εκδ.)C, Abbafati, et al. "Global Age-sex-specific Fertility, Mortality, Healthy Life Expectancy (HALE), and Population Estimates in 204 Countries and Territories, 1950–2019: A Comprehensive Demographic Analysis for the Global Burden of Disease Study 2019." Lancet .
Παραπομπή σε μορφή MLA (9th εκδ.)C, Abbafati, et al. "Global Age-sex-specific Fertility, Mortality, Healthy Life Expectancy (HALE), and Population Estimates in 204 Countries and Territories, 1950–2019: A Comprehensive Demographic Analysis for the Global Burden of Disease Study 2019." Lancet, .