Stone, D. (2010). Difficult conversations: How to discuss what matters most (Tenth anniversary edition, Second edition.). Penguin Books.
Chicago-Zitierstil (17. Ausg.)Stone, Douglas. Difficult Conversations: How to Discuss What Matters Most. Tenth anniversary edition, Second edition. New York: Penguin Books, 2010.
MLA-Zitierstil (8. Ausg.)Stone, Douglas. Difficult Conversations: How to Discuss What Matters Most. Tenth anniversary edition, Second edition. Penguin Books, 2010.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.