MLA

Kramer, Steven, and Teresa Amabile. The Progress Principle : Using Small Wins to Ignite Joy, Engagement, and Creativity At Work. Boston: Harvard Business Review Press, 2011.

APA

Kramer, S., & Amabile, T. (2011). The progress principle : using small wins to ignite joy, engagement, and creativity at work. Boston: Harvard Business Review Press.

Chicago

Kramer, Steven, and Teresa Amabile. The Progress Principle: Using Small Wins to Ignite Joy, Engagement, and Creativity At Work. Boston: Harvard Business Review Press, 2011.