Stone, D., Patton, B., & Heen, S. (1999). Difficult conversations: How to discuss what matters most. Viking.
Chicago-viite (17. p.)Stone, Douglas, Bruce Patton, ja Sheila Heen. Difficult Conversations: How to Discuss What Matters Most. New York, N.Y.: Viking, 1999.
MLA-viite (8. p.)Stone, Douglas, et al. Difficult Conversations: How to Discuss What Matters Most. Viking, 1999.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.