APA引文

Obama, B. (2010). Of thee i sing: A letter to my daughters.

Chicago Style (17th ed.) Citation

Obama, Barack. Of Thee I Sing: A Letter to My Daughters. 2010.

MLA引文

Obama, Barack. Of Thee I Sing: A Letter to My Daughters. 2010.

警告：這些引文格式不一定是100％准確.