APA Style

Elkington, J., Hartigan, P. (2008). Power of Unreasonable People: How Social Entrepreneurs Create Markets That Change The World, The . Boston: Harvard Business School Press.

MLA Style

Elkington, John., Hartigan, Pamela. "Power of Unreasonable People: How Social Entrepreneurs Create Markets That Change The World, The". Boston: Harvard Business School Press, 2008. Books.