Gaya APA

Kotler, J, P., Cohen, D, S. (2002). The Heart of Change: Real-Life stories of How People Change Their Organizations . New York: Harvard Business Press.

Gaya MLA

Kotler, John, P.., Cohen, Dan, S.. "The Heart of Change: Real-Life stories of How People Change Their Organizations". New York: Harvard Business Press, 2002. Text.