Stone, D., Patton, B., & Heen, S. (1999). Difficult conversations: How to discuss what matters most. Viking.
Lua i Stíl Chicago (17ú heag.)Stone, Douglas, Bruce Patton, agus Sheila Heen. Difficult Conversations: How to Discuss What Matters Most. New York, N.Y.: Viking, 1999.
Lua MLA (8ú heag.)Stone, Douglas, et al. Difficult Conversations: How to Discuss What Matters Most. Viking, 1999.
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