Gaya APA

Elkington, John, Hartigan, Pamela. (2008). The power of unreasonable people : how social entrepreneurs create markets that change the world . United States: Harvard Business Review Press.

Gaya Chicago

Elkington, John, Hartigan, Pamela. The power of unreasonable people : how social entrepreneurs create markets that change the world. United States: Harvard Business Review Press, 2008. Text.

Gaya MLA

Elkington, John, Hartigan, Pamela. The power of unreasonable people : how social entrepreneurs create markets that change the world. United States: Harvard Business Review Press, 2008. Text.

Gaya Turabian

Elkington, John, Hartigan, Pamela. The power of unreasonable people : how social entrepreneurs create markets that change the world. United States: Harvard Business Review Press, 2008. Print.