Gaya APA

Arena, C. (2007). The High Purpose Company : The Truly Responsible (and Highly Profitable Firms That Are Changing Business Now) . New York: HarperCollins.

Gaya MLA

Arena, Christine. "The High Purpose Company : The Truly Responsible (and Highly Profitable Firms That Are Changing Business Now)". New York: HarperCollins, 2007. Text.