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Diakses 1 November 2020Psychology Today. https://www.psychologytoday.com/us/blog/the-couch/201403/4-ways-deal-selfish-people
Diakses 1 November 2020Hack Spirit. https://hackspirit.com/selfish-people/
Diakses 1 November 2020Medium. https://medium.com/lady-vivra/how-to-stop-being-selfish-e4e012a167b0
Diakses 1 November 2020