Oprah Winfrey and Her Business Ventures
Raúl Alarcón Jr.: Early Life, Education, Accomplishments
The 10 Greatest Entrepreneurs
Oprah Winfrey - Students, Britannica Kids
Oprah Winfrey - Wikipedia
Who is Oprah Winfrey?, Teaching Wiki
Current Oprah Winfrey Net Worth: Is She A Billionaire? - New Trader U
Oprah Winfrey: A Journey of Influence, Empowerment, and Philanthropy
The Legacy Of Oprah Winfrey - FasterCapital
Rich and Powerful CEOs and Business Leaders