Cita APA (7th ed.)
Obama, B. (2006). The audacity of hope: Barack Obama. Three Rivers Press.
Cita Chicago (17th ed.)
Obama, Barack. The Audacity of Hope: Barack Obama. New York: Three Rivers Press, 2006.
Cita MLA (9th ed.)
Obama, Barack. The Audacity of Hope: Barack Obama. Three Rivers Press, 2006.
Atenció: Aquestes cites poden no estar 100% correctes.