APA Style

Ferreira, S. (2015). 2 Billion Under 20 : How Millennials Are Breaking Down Age Barries and Changing the World . New York: St. Martins Press.

MLA Style

Ferreira, Stacey. "2 Billion Under 20 : How Millennials Are Breaking Down Age Barries and Changing the World". New York: St. Martins Press, 2015. Text.