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المصادر: - https://www.history.co.uk/biographies/john-d-rockefeller

http://mentalfloss.com/article/545633/facts-about-john-d-rockefeller

https://www.cnbc.com/2018/07/23/10-key-management-principles-from-americas-orginal-richest-person.html

https://www.history.com/shows/men-who-built-america/videos/the-men-who-built-america-the-american-dream?playlist_slug=men-who-built-america-season-1-preview-list

https://www.britannica.com/biography/John-D-Rockefeller

https://en.wikipedia.org/wiki/John_D._Rockefeller

https://apprend.io/apush/period-6/the-sherman-anti-trust-act/

https://www.u-s-history.com/pages/h1804.html https://en.wikipedia.org/wiki/Standard_Oil

https://www.visualcapitalist.com/chart-evolution-standard-oil/

https://www.history.com/topics/early-20th-century-us/john-d-rockefeller

https://www.cnbc.com/2018/03/26/david-rockefeller-jr-shares-4-secrets-to-wealth-and-family.html

https://www.forbes.com/profile/rockefeller/#4b5cd9b6430e