Stone, D. (2010). Difficult conversations: How to discuss what matters most (Tenth anniversary edition, Second edition.). Penguin Books.
Chicago-viite (17. p.)Stone, Douglas. Difficult Conversations: How to Discuss What Matters Most. Tenth anniversary edition, Second edition. New York: Penguin Books, 2010.
MLA-viite (8. p.)Stone, Douglas. Difficult Conversations: How to Discuss What Matters Most. Tenth anniversary edition, Second edition. Penguin Books, 2010.
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