MLA

Sontag, Susan. Illness As Metaphor. New York: Farrar, Straus and Giroux, 1978.

APA

Sontag, S. (1978). Illness as metaphor. New York: Farrar, Straus and Giroux.

Chicago

Sontag, Susan, Illness As Metaphor. New York: Farrar, Straus and Giroux, 1978.