1. Statistical Yearbook of Indonesia 2019,2019
2. Indonesia Population Projection 2015–2045 Result of SUPAS 2015,2018
3. Ageinghttps://www.who.int/health-topics/ageing#tab=tab_1
4. Ageing and Healthhttps://www.who.int/news-room/fact-sheets/detail/ageing-and-health
5. Noncommunicable Diseaseshttps://www.who.int/news-room/fact-sheets/detail/noncommunicable-diseases