Stone Douglas, Heen, S., & Patton Bruce. (1999). Difficult conversations: How to discuss what matters most. Penguin Books.
Chicago-referens (17:e uppl.)Stone Douglas, Sheila Heen, och Patton Bruce. Difficult Conversations: How to Discuss What Matters Most. New York: Penguin Books, 1999.
MLA-referens (9:e uppl.)Stone Douglas, et al. Difficult Conversations: How to Discuss What Matters Most. Penguin Books, 1999.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.