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Diakses pada 19 Desember 2019Help Guide. https://www.helpguide.org/articles/alzheimers-dementia-aging/preventing-alzheimers-disease.htm
Diakses pada 19 Desember 2019WebMD. https://www.webmd.com/healthy-aging/guide/9-brain-boosters-to-prevent-memory-loss#1
Diakses pada 18 Juli 2021