Cita APA (7a ed.)

Obama, B., & Long, L. (2010). Of thee I sing: A letter to my daughters. Alfred A. Knopf.

Cita Chicago Style (17a ed.)

Obama, Barack, y Loren Long. Of Thee I Sing: A Letter to My Daughters. New York: Alfred A. Knopf, 2010.

Cita MLA (8a ed.)

Obama, Barack, y Loren Long. Of Thee I Sing: A Letter to My Daughters. Alfred A. Knopf, 2010.

Precaución: Estas citas no son 100% exactas.