Gaya APA

Izzo, J., Vanderwielen, J. (2018). The Purpose Revolution: How Leaders Create Engagement and Competitive Advantage in an Age of Social good . USA: Berret Koehler.

Gaya MLA

Izzo, John., Vanderwielen, Jeff. "The Purpose Revolution: How Leaders Create Engagement and Competitive Advantage in an Age of Social good". USA: Berret Koehler, 2018. Text.