Stone Douglas, Heen, S., & Patton Bruce. (1999). Difficult conversations: How to discuss what matters most. Penguin Books.
Lua i Stíl Chicago (17ú heag.)Stone Douglas, Sheila Heen, agus Patton Bruce. Difficult Conversations: How to Discuss What Matters Most. New York: Penguin Books, 1999.
Lua MLA (9ú heag.)Stone Douglas, et al. Difficult Conversations: How to Discuss What Matters Most. Penguin Books, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.