Cita APA (7a ed.)

Obama, B., & Ruth, G. (2009). Our enduring spirit: President Barack Obama's first words to America. Harper.

Cita Chicago Style (17a ed.)

Obama, Barack, y Greg Ruth. Our Enduring Spirit: President Barack Obama's First Words to America. New York, NY: Harper, 2009.

Cita MLA (8a ed.)

Obama, Barack, y Greg Ruth. Our Enduring Spirit: President Barack Obama's First Words to America. Harper, 2009.

Precaución: Estas citas no son 100% exactas.