Stone, D., Patton, B., & Heen, S. (1999). Difficult conversations: How to discuss what matters most (1a. ed.). Penguin Books.
Citace podle Chicago (17th ed.)Stone, Douglas, Bruce Patton, a Sheila Heen. Difficult Conversations: How to Discuss What Matters Most. 1a. ed. Nueva York: Penguin Books, 1999.
Citace podle MLA (9th ed.)Stone, Douglas, et al. Difficult Conversations: How to Discuss What Matters Most. 1a. ed. Penguin Books, 1999.
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