MLA

Cain, Susan. Quiet : the Power of Introverts In a World That Can't Stop Talkingqusan Cain. London: Penguin books, 2012.

APA

Cain, S. (2012). Quiet : the power of introverts in a world that can't stop talkingQusan Cain. London: Penguin books.

Chicago

Cain, Susan, Quiet: The Power of Introverts In a World That Can't Stop Talkingqusan Cain. London: Penguin books, 2012.