APA (7th ed.) Citation

Stone, D., Patton, B., & Heen, S. (1999). Difficult conversations: How to discuss what matters most (1a. ed.). Penguin Books.

Chicago Style (17th ed.) Citation

Stone, Douglas, Bruce Patton, and Sheila Heen. Difficult Conversations: How to Discuss What Matters Most. 1a. ed. Nueva York: Penguin Books, 1999.

MLA (9th ed.) Citation

Stone, Douglas, et al. Difficult Conversations: How to Discuss What Matters Most. 1a. ed. Penguin Books, 1999.