APA (6th ed.):
ProCon.org. (2012, May 25). Barack Obama: Document History from Birth to Harvard (1961-1991). Retrieved from https://www.procon.org/barack-obama-document-history-from-birth-to-harvard-1961-1991/
[Editor's Note: The APA citation style requires double spacing within entries.]
Chicago (17th ed.):
ProCon.org, "Barack Obama: Document History from Birth to Harvard (1961-1991)," ProCon.org. last modified May 25, 2012. https://www.procon.org/barack-obama-document-history-from-birth-to-harvard-1961-1991/.
MLA (8th ed.):
ProCon.org, "Barack Obama: Document History from Birth to Harvard (1961-1991)." ProCon.org. 25 May 2012, www.procon.org/barack-obama-document-history-from-birth-to-harvard-1961-1991/
[Editor’s Note: The MLA citation style requires double spacing within entries.]
Turabian (8th ed.):
ProCon.org. "Barack Obama: Document History from Birth to Harvard (1961-1991)." ProCon.org. Last modified on May 25, 2012. Accessed January 15, 2021. https://www.procon.org/barack-obama-document-history-from-birth-to-harvard-1961-1991/