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