MLA

Sontag, Susan. Regarding the Pain of Others. New York: Farrar, Straus and Giroux, 2003.

APA

Sontag, S. (2003). Regarding the pain of others. New York: Farrar, Straus and Giroux.

Chicago

Sontag, Susan, Regarding the Pain of Others. New York: Farrar, Straus and Giroux, 2003.