Gaya APA
Stone, D. (2000).
Difficult conversations : how to discuss what matters most / Douglas Stone (Cet. 1).
New York:
Penguin Books.
Gaya MLA
Stone, Douglas.
"Difficult conversations : how to discuss what matters most / Douglas Stone".
Cet. 1
New York:
Penguin Books,
2000.
Buku.