1. Information on https://www.who.int/dg/speeches/detail/who-director-general-s-opening-remarks-at-the-media-briefing-on-covid-19--13-april-2020 pada 3 Mei 2020.
2. Information on https://www.malaysiakini.com/columns/520063
3. Information on https://www.nst.com.my/news/nation/2020/05/589227/longer-wait-could-have-resulted-more-losses-revenue
4. M. Hechter, Acta: Socioogica. (1992).
5. K. Mattu, “Inter Internal colonialism in Western Europe: The Case of Sardinia” (Barcelona: University of Barcelona Press, 2012)