APA (7th ed.) Citation

Stone, D., Patton, B., & Heen, S. (2011). Difficult conversations: How to discuss what matters most (Updated tenth anniversary edition.). Portfolio Penguin.

Chicago Style (17th ed.) Citation

Stone, Douglas, Bruce Patton, and Sheila Heen. Difficult Conversations: How to Discuss What Matters Most. Updated tenth anniversary edition. London: Portfolio Penguin, 2011.

MLA (9th ed.) Citation

Stone, Douglas, et al. Difficult Conversations: How to Discuss What Matters Most. Updated tenth anniversary edition. Portfolio Penguin, 2011.