APA (7th ed.) Citation

Stone, D., Patton, B., & Heen, S. (2000). Difficult conversations: How to discuss what matters most. Penguin Books.

Chicago Style (17th ed.) Citation

Stone, Douglas, Bruce Patton, and Sheila Heen. Difficult Conversations: How to Discuss What Matters Most. New York, N.Y: Penguin Books, 2000.

MLA (9th ed.) Citation

Stone, Douglas, et al. Difficult Conversations: How to Discuss What Matters Most. Penguin Books, 2000.